07ce88e9de
-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAl/sVdwACgkQONu9yGCS aT581g/+KZ4lFcY/lAEY6/n6RjFenerl5O2a4tqO+j7eivOA8aNOzXQpvwcPXFKZ uCCwab3shrp0MdOJ4Ub1qLF5rZoJ/QvLNkI+8GVRztnchkWHwNlYbheZqHRows9E LM5w/+SUh+I7wymfjsjxr8ohSOxkvygNL9PLLTkuQMwbs/jjdizmcgqeYo54Plih IdtHrp/ZjxKMOu+fkp1dpTy2RUfbxxWS4RnVjSI+g3s8vaxWh90jMCwLP3fyUwpX a8eNCFkIV0lBCj+dYF+ry5x7wGd9mvCVAG70DmRkHd4nyc1WGnp+yz3lQlQnIzeq Hc7k3ts3FXmXBSRTzkqM9pmaOuyrKwqu3DoiplXxHgjeJYegP9k0jh33eohXmc/u qSz9XB3FhBxy7uRf8tqGLKiUsARnQUYfqzR8qgGFndvWRpIBr9egSzDKVNSF5uWu bPt3UQpM8O714NcnB2PGs4OUPqxSikT3BrnfurZOzEddkSveXfkItYnt3mc300bx MSHYY/iuLpsBeDd0U6POgf5J5RigmOWvayZrMkPSxlnm7v9diefpKo7xB7+l3AqD DZ5BSZMNtgKHwzck6d3RXX+GCILreL16Lj299NM1SJPm+j5SEkna7luikgi2pqrk r2cD31L9JHiq36L3uP5u30JoxEG6+W2Px+dqc+uyB3RXHJzRwy4= =TKv4 -----END PGP SIGNATURE----- Merge 4.19.164 into android-4.19-stable Changes in 4.19.164 Kbuild: do not emit debug info for assembly with LLVM_IAS=1 x86/lib: Change .weak to SYM_FUNC_START_WEAK for arch/x86/lib/mem*_64.S spi: bcm2835aux: Fix use-after-free on unbind spi: bcm2835aux: Restore err assignment in bcm2835aux_spi_probe iwlwifi: pcie: limit memory read spin time arm64: dts: rockchip: Assign a fixed index to mmc devices on rk3399 boards. iwlwifi: mvm: fix kernel panic in case of assert during CSA powerpc: Drop -me200 addition to build flags ARC: stack unwinding: don't assume non-current task is sleeping scsi: ufs: Make sure clk scaling happens only when HBA is runtime ACTIVE irqchip/gic-v3-its: Unconditionally save/restore the ITS state on suspend soc: fsl: dpio: Get the cpumask through cpumask_of(cpu) platform/x86: thinkpad_acpi: Do not report SW_TABLET_MODE on Yoga 11e platform/x86: thinkpad_acpi: Add BAT1 is primary battery quirk for Thinkpad Yoga 11e 4th gen platform/x86: acer-wmi: add automatic keyboard background light toggle key as KEY_LIGHTS_TOGGLE platform/x86: intel-vbtn: Support for tablet mode on HP Pavilion 13 x360 PC Input: cm109 - do not stomp on control URB Input: i8042 - add Acer laptops to the i8042 reset list pinctrl: amd: remove debounce filter setting in IRQ type setting mmc: block: Fixup condition for CMD13 polling for RPMB requests kbuild: avoid static_assert for genksyms scsi: be2iscsi: Revert "Fix a theoretical leak in beiscsi_create_eqs()" x86/mm/mem_encrypt: Fix definition of PMD_FLAGS_DEC_WP x86/membarrier: Get rid of a dubious optimization x86/apic/vector: Fix ordering in vector assignment compiler.h: fix barrier_data() on clang PCI: qcom: Add missing reset for ipq806x mac80211: mesh: fix mesh_pathtbl_init() error path net: stmmac: free tx skb buffer in stmmac_resume() tcp: select sane initial rcvq_space.space for big MSS tcp: fix cwnd-limited bug for TSO deferral where we send nothing net/mlx4_en: Avoid scheduling restart task if it is already running lan743x: fix for potential NULL pointer dereference with bare card net/mlx4_en: Handle TX error CQE net: stmmac: delete the eee_ctrl_timer after napi disabled net: stmmac: dwmac-meson8b: fix mask definition of the m250_sel mux net: bridge: vlan: fix error return code in __vlan_add() ktest.pl: If size of log is too big to email, email error message USB: dummy-hcd: Fix uninitialized array use in init() USB: add RESET_RESUME quirk for Snapscan 1212 ALSA: usb-audio: Fix potential out-of-bounds shift ALSA: usb-audio: Fix control 'access overflow' errors from chmap xhci: Give USB2 ports time to enter U3 in bus suspend USB: UAS: introduce a quirk to set no_write_same USB: sisusbvga: Make console support depend on BROKEN ALSA: pcm: oss: Fix potential out-of-bounds shift serial: 8250_omap: Avoid FIFO corruption caused by MDR1 access drm/xen-front: Fix misused IS_ERR_OR_NULL checks drm: fix drm_dp_mst_port refcount leaks in drm_dp_mst_allocate_vcpi arm64: lse: fix LSE atomics with LLVM's integrated assembler arm64: lse: Fix LSE atomics with LLVM arm64: Change .weak to SYM_FUNC_START_WEAK_PI for arch/arm64/lib/mem*.S x86/resctrl: Remove unused struct mbm_state::chunks_bw x86/resctrl: Fix incorrect local bandwidth when mba_sc is enabled pinctrl: merrifield: Set default bias in case no particular value given pinctrl: baytrail: Avoid clearing debounce value when turning it off ARM: dts: sun8i: v3s: fix GIC node memory range gpio: mvebu: fix potential user-after-free on probe scsi: bnx2i: Requires MMU xsk: Fix xsk_poll()'s return type can: softing: softing_netdev_open(): fix error handling clk: renesas: r9a06g032: Drop __packed for portability block: factor out requeue handling from dispatch code netfilter: x_tables: Switch synchronization to RCU gpio: eic-sprd: break loop when getting NULL device resource selftests/bpf/test_offload.py: Reset ethtool features after failed setting RDMA/cm: Fix an attempt to use non-valid pointer when cleaning timewait ixgbe: avoid premature Rx buffer reuse drm/tegra: replace idr_init() by idr_init_base() kernel/cpu: add arch override for clear_tasks_mm_cpumask() mm handling drm/tegra: sor: Disable clocks on error in tegra_sor_init() arm64: syscall: exit userspace before unmasking exceptions vxlan: Add needed_headroom for lower device vxlan: Copy needed_tailroom from lowerdev scsi: mpt3sas: Increase IOCInit request timeout to 30s dm table: Remove BUG_ON(in_interrupt()) soc/tegra: fuse: Fix index bug in get_process_id USB: serial: option: add interface-number sanity check to flag handling USB: gadget: f_acm: add support for SuperSpeed Plus USB: gadget: f_midi: setup SuperSpeed Plus descriptors usb: gadget: f_fs: Re-use SS descriptors for SuperSpeedPlus USB: gadget: f_rndis: fix bitrate for SuperSpeed and above usb: chipidea: ci_hdrc_imx: Pass DISABLE_DEVICE_STREAMING flag to imx6ul ARM: dts: exynos: fix roles of USB 3.0 ports on Odroid XU ARM: dts: exynos: fix USB 3.0 VBUS control and over-current pins on Exynos5410 ARM: dts: exynos: fix USB 3.0 pins supply being turned off on Odroid XU coresight: tmc-etr: Check if page is valid before dma_map_page() scsi: megaraid_sas: Check user-provided offsets HID: i2c-hid: add Vero K147 to descriptor override serial_core: Check for port state when tty is in error state Bluetooth: Fix slab-out-of-bounds read in hci_le_direct_adv_report_evt() quota: Sanity-check quota file headers on load media: msi2500: assign SPI bus number dynamically crypto: af_alg - avoid undefined behavior accessing salg_name md: fix a warning caused by a race between concurrent md_ioctl()s perf cs-etm: Change tuple from traceID-CPU# to traceID-metadata perf cs-etm: Move definition of 'traceid_list' global variable from header file drm/gma500: fix double free of gma_connector drm/tve200: Fix handling of platform_get_irq() error soc: renesas: rmobile-sysc: Fix some leaks in rmobile_init_pm_domains() soc: mediatek: Check if power domains can be powered on at boot time soc: qcom: geni: More properly switch to DMA mode RDMA/bnxt_re: Set queue pair state when being queried selinux: fix error initialization in inode_doinit_with_dentry() ARM: dts: aspeed: s2600wf: Fix VGA memory region location RDMA/rxe: Compute PSN windows correctly x86/mm/ident_map: Check for errors from ident_pud_init() ARM: p2v: fix handling of LPAE translation in BE mode x86/apic: Fix x2apic enablement without interrupt remapping sched/deadline: Fix sched_dl_global_validate() sched: Reenable interrupts in do_sched_yield() crypto: talitos - Endianess in current_desc_hdr() crypto: talitos - Fix return type of current_desc_hdr() crypto: inside-secure - Fix sizeof() mismatch powerpc/64: Set up a kernel stack for secondaries before cpu_restore() spi: img-spfi: fix reference leak in img_spfi_resume drm/msm/dsi_pll_10nm: restore VCO rate during restore_state ASoC: pcm: DRAIN support reactivation selinux: fix inode_doinit_with_dentry() LABEL_INVALID error handling arm64: dts: exynos: Include common syscon restart/poweroff for Exynos7 arm64: dts: exynos: Correct psci compatible used on Exynos7 Bluetooth: Fix null pointer dereference in hci_event_packet() Bluetooth: hci_h5: fix memory leak in h5_close spi: spi-ti-qspi: fix reference leak in ti_qspi_setup spi: tegra20-slink: fix reference leak in slink ops of tegra20 spi: tegra20-sflash: fix reference leak in tegra_sflash_resume spi: tegra114: fix reference leak in tegra spi ops spi: bcm63xx-hsspi: fix missing clk_disable_unprepare() on error in bcm63xx_hsspi_resume mwifiex: fix mwifiex_shutdown_sw() causing sw reset failure ASoC: wm8998: Fix PM disable depth imbalance on error ASoC: arizona: Fix a wrong free in wm8997_probe RDMa/mthca: Work around -Wenum-conversion warning MIPS: BCM47XX: fix kconfig dependency bug for BCM47XX_BCMA crypto: qat - fix status check in qat_hal_put_rel_rd_xfer() staging: greybus: codecs: Fix reference counter leak in error handling staging: gasket: interrupt: fix the missed eventfd_ctx_put() in gasket_interrupt.c media: tm6000: Fix sizeof() mismatches media: mtk-vcodec: add missing put_device() call in mtk_vcodec_release_dec_pm() ASoC: meson: fix COMPILE_TEST error scsi: core: Fix VPD LUN ID designator priorities media: solo6x10: fix missing snd_card_free in error handling case video: fbdev: atmel_lcdfb: fix return error code in atmel_lcdfb_of_init() drm/omap: dmm_tiler: fix return error code in omap_dmm_probe() Input: ads7846 - fix race that causes missing releases Input: ads7846 - fix integer overflow on Rt calculation Input: ads7846 - fix unaligned access on 7845 usb/max3421: fix return error code in max3421_probe() spi: mxs: fix reference leak in mxs_spi_probe powerpc/feature: Fix CPU_FTRS_ALWAYS by removing CPU_FTRS_GENERIC_32 crypto: crypto4xx - Replace bitwise OR with logical OR in crypto4xx_build_pd crypto: omap-aes - Fix PM disable depth imbalance in omap_aes_probe spi: fix resource leak for drivers without .remove callback soc: ti: knav_qmss: fix reference leak in knav_queue_probe soc: ti: Fix reference imbalance in knav_dma_probe drivers: soc: ti: knav_qmss_queue: Fix error return code in knav_queue_probe Input: omap4-keypad - fix runtime PM error handling RDMA/cxgb4: Validate the number of CQEs memstick: fix a double-free bug in memstick_check ARM: dts: at91: sama5d4_xplained: add pincontrol for USB Host ARM: dts: at91: sama5d3_xplained: add pincontrol for USB Host orinoco: Move context allocation after processing the skb cw1200: fix missing destroy_workqueue() on error in cw1200_init_common dmaengine: mv_xor_v2: Fix error return code in mv_xor_v2_probe() media: siano: fix memory leak of debugfs members in smsdvb_hotplug platform/x86: mlx-platform: Remove PSU EEPROM from default platform configuration platform/x86: mlx-platform: Remove PSU EEPROM from MSN274x platform configuration samples: bpf: Fix lwt_len_hist reusing previous BPF map mips: cdmm: fix use-after-free in mips_cdmm_bus_discover media: max2175: fix max2175_set_csm_mode() error code slimbus: qcom-ngd-ctrl: Avoid sending power requests without QMI HSI: omap_ssi: Don't jump to free ID in ssi_add_controller() ARM: dts: Remove non-existent i2c1 from 98dx3236 arm64: dts: rockchip: Set dr_mode to "host" for OTG on rk3328-roc-cc power: supply: axp288_charger: Fix HP Pavilion x2 10 DMI matching power: supply: bq24190_charger: fix reference leak genirq/irqdomain: Don't try to free an interrupt that has no mapping PCI: Bounds-check command-line resource alignment requests PCI: Fix overflow in command-line resource alignment requests PCI: iproc: Fix out-of-bound array accesses arm64: dts: meson: fix spi-max-frequency on Khadas VIM2 ARM: dts: at91: at91sam9rl: fix ADC triggers platform/x86: dell-smbios-base: Fix error return code in dell_smbios_init ath10k: Fix the parsing error in service available event ath10k: Fix an error handling path ath10k: Release some resources in an error handling path NFSv4.2: condition READDIR's mask for security label based on LSM state SUNRPC: xprt_load_transport() needs to support the netid "rdma6" lockd: don't use interval-based rebinding over TCP NFS: switch nfsiod to be an UNBOUND workqueue. vfio-pci: Use io_remap_pfn_range() for PCI IO memory media: saa7146: fix array overflow in vidioc_s_audio() clocksource/drivers/cadence_ttc: Fix memory leak in ttc_setup_clockevent() ARM: dts: at91: sama5d2: map securam as device pinctrl: falcon: add missing put_device() call in pinctrl_falcon_probe() arm64: dts: rockchip: Fix UART pull-ups on rk3328 memstick: r592: Fix error return in r592_probe() net/mlx5: Properly convey driver version to firmware ASoC: jz4740-i2s: add missed checks for clk_get() dm ioctl: fix error return code in target_message clocksource/drivers/arm_arch_timer: Correct fault programming of CNTKCTL_EL1.EVNTI cpufreq: highbank: Add missing MODULE_DEVICE_TABLE cpufreq: mediatek: Add missing MODULE_DEVICE_TABLE cpufreq: st: Add missing MODULE_DEVICE_TABLE cpufreq: loongson1: Add missing MODULE_ALIAS cpufreq: scpi: Add missing MODULE_ALIAS scsi: qedi: Fix missing destroy_workqueue() on error in __qedi_probe scsi: pm80xx: Fix error return in pm8001_pci_probe() seq_buf: Avoid type mismatch for seq_buf_init scsi: fnic: Fix error return code in fnic_probe() platform/x86: mlx-platform: Fix item counter assignment for MSN2700, MSN24xx systems powerpc/pseries/hibernation: drop pseries_suspend_begin() from suspend ops powerpc/pseries/hibernation: remove redundant cacheinfo update usb: ehci-omap: Fix PM disable depth umbalance in ehci_hcd_omap_probe usb: oxu210hp-hcd: Fix memory leak in oxu_create speakup: fix uninitialized flush_lock nfsd: Fix message level for normal termination nfs_common: need lock during iterate through the list x86/kprobes: Restore BTF if the single-stepping is cancelled bus: fsl-mc: fix error return code in fsl_mc_object_allocate() clk: tegra: Fix duplicated SE clock entry extcon: max77693: Fix modalias string mac80211: don't set set TDLS STA bandwidth wider than possible ASoC: wm_adsp: remove "ctl" from list on error in wm_adsp_create_control() irqchip/alpine-msi: Fix freeing of interrupts on allocation error path watchdog: sirfsoc: Add missing dependency on HAS_IOMEM watchdog: sprd: remove watchdog disable from resume fail path watchdog: sprd: check busy bit before new loading rather than after that watchdog: Fix potential dereferencing of null pointer um: Monitor error events in IRQ controller um: tty: Fix handling of close in tty lines um: chan_xterm: Fix fd leak nfc: s3fwrn5: Release the nfc firmware powerpc/ps3: use dma_mapping_error() checkpatch: fix unescaped left brace net: bcmgenet: Fix a resource leak in an error handling path in the probe functin net: allwinner: Fix some resources leak in the error handling path of the probe and in the remove function net: korina: fix return value libnvdimm/label: Return -ENXIO for no slot in __blk_label_update watchdog: qcom: Avoid context switch in restart handler watchdog: coh901327: add COMMON_CLK dependency clk: ti: Fix memleak in ti_fapll_synth_setup pwm: zx: Add missing cleanup in error path pwm: lp3943: Dynamically allocate PWM chip base perf record: Fix memory leak when using '--user-regs=?' to list registers qlcnic: Fix error code in probe clk: s2mps11: Fix a resource leak in error handling paths in the probe function clk: sunxi-ng: Make sure divider tables have sentinel kconfig: fix return value of do_error_if() ARM: sunxi: Add machine match for the Allwinner V3 SoC cfg80211: initialize rekey_data fix namespaced fscaps when !CONFIG_SECURITY lwt: Disable BH too in run_lwt_bpf() Input: cros_ec_keyb - send 'scancodes' in addition to key events Input: goodix - add upside-down quirk for Teclast X98 Pro tablet media: gspca: Fix memory leak in probe media: sunxi-cir: ensure IR is handled when it is continuous media: netup_unidvb: Don't leak SPI master in probe error path media: ipu3-cio2: Remove traces of returned buffers media: ipu3-cio2: Return actual subdev format media: ipu3-cio2: Serialise access to pad format media: ipu3-cio2: Validate mbus format in setting subdev format media: ipu3-cio2: Make the field on subdev format V4L2_FIELD_NONE Input: cyapa_gen6 - fix out-of-bounds stack access ALSA: hda/ca0132 - Change Input Source enum strings. PM: ACPI: PCI: Drop acpi_pm_set_bridge_wakeup() Revert "ACPI / resources: Use AE_CTRL_TERMINATE to terminate resources walks" ACPI: PNP: compare the string length in the matching_id() ALSA: hda: Fix regressions on clear and reconfig sysfs ALSA: hda/realtek - Enable headset mic of ASUS X430UN with ALC256 ALSA: hda/realtek - Enable headset mic of ASUS Q524UQK with ALC255 ALSA: pcm: oss: Fix a few more UBSAN fixes ALSA: hda/realtek: Add quirk for MSI-GP73 ALSA: hda/realtek: Apply jack fixup for Quanta NL3 ALSA: usb-audio: Add VID to support native DSD reproduction on FiiO devices ALSA: usb-audio: Disable sample read check if firmware doesn't give back s390/smp: perform initial CPU reset also for SMT siblings s390/kexec_file: fix diag308 subcode when loading crash kernel s390/dasd: fix hanging device offline processing s390/dasd: prevent inconsistent LCU device data s390/dasd: fix list corruption of pavgroup group list s390/dasd: fix list corruption of lcu list staging: comedi: mf6x4: Fix AI end-of-conversion detection powerpc/perf: Exclude kernel samples while counting events in user space. crypto: ecdh - avoid unaligned accesses in ecdh_set_secret() EDAC/amd64: Fix PCI component registration USB: serial: mos7720: fix parallel-port state restore USB: serial: digi_acceleport: fix write-wakeup deadlocks USB: serial: keyspan_pda: fix dropped unthrottle interrupts USB: serial: keyspan_pda: fix write deadlock USB: serial: keyspan_pda: fix stalled writes USB: serial: keyspan_pda: fix write-wakeup use-after-free USB: serial: keyspan_pda: fix tx-unthrottle use-after-free USB: serial: keyspan_pda: fix write unthrottling ext4: fix a memory leak of ext4_free_data ext4: fix deadlock with fs freezing and EA inodes KVM: arm64: Introduce handling of AArch32 TTBCR2 traps ARM: dts: pandaboard: fix pinmux for gpio user button of Pandaboard ES ARM: dts: at91: sama5d2: fix CAN message ram offset and size powerpc: Fix incorrect stw{, ux, u, x} instructions in __set_pte_at powerpc/rtas: Fix typo of ibm,open-errinjct in RTAS filter powerpc/xmon: Change printk() to pr_cont() powerpc/powernv/memtrace: Don't leak kernel memory to user space powerpc/powernv/memtrace: Fix crashing the kernel when enabling concurrently ima: Don't modify file descriptor mode on the fly ceph: fix race in concurrent __ceph_remove_cap invocations SMB3: avoid confusing warning message on mount to Azure SMB3.1.1: do not log warning message if server doesn't populate salt ubifs: wbuf: Don't leak kernel memory to flash jffs2: Fix GC exit abnormally jfs: Fix array index bounds check in dbAdjTree drm/dp_aux_dev: check aux_dev before use in drm_dp_aux_dev_get_by_minor() spi: spi-sh: Fix use-after-free on unbind spi: davinci: Fix use-after-free on unbind spi: pic32: Don't leak DMA channels in probe error path spi: rb4xx: Don't leak SPI master in probe error path spi: sc18is602: Don't leak SPI master in probe error path spi: st-ssc4: Fix unbalanced pm_runtime_disable() in probe error path spi: mt7621: fix missing clk_disable_unprepare() on error in mt7621_spi_probe soc: qcom: smp2p: Safely acquire spinlock without IRQs mtd: spinand: Fix OOB read mtd: parser: cmdline: Fix parsing of part-names with colons mtd: rawnand: qcom: Fix DMA sync on FLASH_STATUS register read scsi: lpfc: Fix invalid sleeping context in lpfc_sli4_nvmet_alloc() scsi: lpfc: Re-fix use after free in lpfc_rq_buf_free() iio: buffer: Fix demux update iio: adc: rockchip_saradc: fix missing clk_disable_unprepare() on error in rockchip_saradc_resume iio:light:rpr0521: Fix timestamp alignment and prevent data leak. iio:light:st_uvis25: Fix timestamp alignment and prevent data leak. iio:pressure:mpl3115: Force alignment of buffer iio:imu:bmi160: Fix too large a buffer. md/cluster: block reshape with remote resync job md/cluster: fix deadlock when node is doing resync job pinctrl: sunxi: Always call chained_irq_{enter, exit} in sunxi_pinctrl_irq_handler clk: mvebu: a3700: fix the XTAL MODE pin to MPP1_9 xen-blkback: set ring->xenblkd to NULL after kthread_stop() xen/xenbus: Allow watches discard events before queueing xen/xenbus: Add 'will_handle' callback support in xenbus_watch_path() xen/xenbus/xen_bus_type: Support will_handle watch callback xen/xenbus: Count pending messages for each watch xenbus/xenbus_backend: Disallow pending watch messages libnvdimm/namespace: Fix reaping of invalidated block-window-namespace labels platform/x86: intel-vbtn: Allow switch events on Acer Switch Alpha 12 PCI: Fix pci_slot_release() NULL pointer dereference platform/x86: mlx-platform: remove an unused variable Linux 4.19.164 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com> Change-Id: I8e2d24b45393ee2360186893d4e578e20156c7f1
1286 lines
36 KiB
C
1286 lines
36 KiB
C
/*
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* drivers/acpi/device_pm.c - ACPI device power management routines.
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*
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* Copyright (C) 2012, Intel Corp.
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* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/acpi.h>
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#include <linux/export.h>
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#include <linux/mutex.h>
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#include <linux/pm_qos.h>
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#include <linux/pm_domain.h>
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#include <linux/pm_runtime.h>
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#include <linux/suspend.h>
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#include "internal.h"
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#define _COMPONENT ACPI_POWER_COMPONENT
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ACPI_MODULE_NAME("device_pm");
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/**
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* acpi_power_state_string - String representation of ACPI device power state.
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* @state: ACPI device power state to return the string representation of.
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*/
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const char *acpi_power_state_string(int state)
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{
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switch (state) {
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case ACPI_STATE_D0:
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return "D0";
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case ACPI_STATE_D1:
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return "D1";
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case ACPI_STATE_D2:
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return "D2";
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case ACPI_STATE_D3_HOT:
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return "D3hot";
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case ACPI_STATE_D3_COLD:
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return "D3cold";
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default:
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return "(unknown)";
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}
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}
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/**
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* acpi_device_get_power - Get power state of an ACPI device.
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* @device: Device to get the power state of.
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* @state: Place to store the power state of the device.
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*
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* This function does not update the device's power.state field, but it may
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* update its parent's power.state field (when the parent's power state is
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* unknown and the device's power state turns out to be D0).
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*/
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int acpi_device_get_power(struct acpi_device *device, int *state)
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{
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int result = ACPI_STATE_UNKNOWN;
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if (!device || !state)
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return -EINVAL;
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if (!device->flags.power_manageable) {
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/* TBD: Non-recursive algorithm for walking up hierarchy. */
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*state = device->parent ?
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device->parent->power.state : ACPI_STATE_D0;
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goto out;
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}
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/*
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* Get the device's power state from power resources settings and _PSC,
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* if available.
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*/
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if (device->power.flags.power_resources) {
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int error = acpi_power_get_inferred_state(device, &result);
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if (error)
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return error;
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}
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if (device->power.flags.explicit_get) {
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acpi_handle handle = device->handle;
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unsigned long long psc;
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acpi_status status;
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status = acpi_evaluate_integer(handle, "_PSC", NULL, &psc);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* The power resources settings may indicate a power state
|
|
* shallower than the actual power state of the device, because
|
|
* the same power resources may be referenced by other devices.
|
|
*
|
|
* For systems predating ACPI 4.0 we assume that D3hot is the
|
|
* deepest state that can be supported.
|
|
*/
|
|
if (psc > result && psc < ACPI_STATE_D3_COLD)
|
|
result = psc;
|
|
else if (result == ACPI_STATE_UNKNOWN)
|
|
result = psc > ACPI_STATE_D2 ? ACPI_STATE_D3_HOT : psc;
|
|
}
|
|
|
|
/*
|
|
* If we were unsure about the device parent's power state up to this
|
|
* point, the fact that the device is in D0 implies that the parent has
|
|
* to be in D0 too, except if ignore_parent is set.
|
|
*/
|
|
if (!device->power.flags.ignore_parent && device->parent
|
|
&& device->parent->power.state == ACPI_STATE_UNKNOWN
|
|
&& result == ACPI_STATE_D0)
|
|
device->parent->power.state = ACPI_STATE_D0;
|
|
|
|
*state = result;
|
|
|
|
out:
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is %s\n",
|
|
device->pnp.bus_id, acpi_power_state_string(*state)));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_dev_pm_explicit_set(struct acpi_device *adev, int state)
|
|
{
|
|
if (adev->power.states[state].flags.explicit_set) {
|
|
char method[5] = { '_', 'P', 'S', '0' + state, '\0' };
|
|
acpi_status status;
|
|
|
|
status = acpi_evaluate_object(adev->handle, method, NULL, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* acpi_device_set_power - Set power state of an ACPI device.
|
|
* @device: Device to set the power state of.
|
|
* @state: New power state to set.
|
|
*
|
|
* Callers must ensure that the device is power manageable before using this
|
|
* function.
|
|
*/
|
|
int acpi_device_set_power(struct acpi_device *device, int state)
|
|
{
|
|
int target_state = state;
|
|
int result = 0;
|
|
|
|
if (!device || !device->flags.power_manageable
|
|
|| (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
|
|
return -EINVAL;
|
|
|
|
/* Make sure this is a valid target state */
|
|
|
|
if (state == device->power.state) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] already in %s\n",
|
|
device->pnp.bus_id,
|
|
acpi_power_state_string(state)));
|
|
return 0;
|
|
}
|
|
|
|
if (state == ACPI_STATE_D3_COLD) {
|
|
/*
|
|
* For transitions to D3cold we need to execute _PS3 and then
|
|
* possibly drop references to the power resources in use.
|
|
*/
|
|
state = ACPI_STATE_D3_HOT;
|
|
/* If D3cold is not supported, use D3hot as the target state. */
|
|
if (!device->power.states[ACPI_STATE_D3_COLD].flags.valid)
|
|
target_state = state;
|
|
} else if (!device->power.states[state].flags.valid) {
|
|
dev_warn(&device->dev, "Power state %s not supported\n",
|
|
acpi_power_state_string(state));
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!device->power.flags.ignore_parent &&
|
|
device->parent && (state < device->parent->power.state)) {
|
|
dev_warn(&device->dev,
|
|
"Cannot transition to power state %s for parent in %s\n",
|
|
acpi_power_state_string(state),
|
|
acpi_power_state_string(device->parent->power.state));
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Transition Power
|
|
* ----------------
|
|
* In accordance with ACPI 6, _PSx is executed before manipulating power
|
|
* resources, unless the target state is D0, in which case _PS0 is
|
|
* supposed to be executed after turning the power resources on.
|
|
*/
|
|
if (state > ACPI_STATE_D0) {
|
|
/*
|
|
* According to ACPI 6, devices cannot go from lower-power
|
|
* (deeper) states to higher-power (shallower) states.
|
|
*/
|
|
if (state < device->power.state) {
|
|
dev_warn(&device->dev, "Cannot transition from %s to %s\n",
|
|
acpi_power_state_string(device->power.state),
|
|
acpi_power_state_string(state));
|
|
return -ENODEV;
|
|
}
|
|
|
|
result = acpi_dev_pm_explicit_set(device, state);
|
|
if (result)
|
|
goto end;
|
|
|
|
if (device->power.flags.power_resources)
|
|
result = acpi_power_transition(device, target_state);
|
|
} else {
|
|
if (device->power.flags.power_resources) {
|
|
result = acpi_power_transition(device, ACPI_STATE_D0);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
result = acpi_dev_pm_explicit_set(device, ACPI_STATE_D0);
|
|
}
|
|
|
|
end:
|
|
if (result) {
|
|
dev_warn(&device->dev, "Failed to change power state to %s\n",
|
|
acpi_power_state_string(target_state));
|
|
} else {
|
|
device->power.state = target_state;
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Device [%s] transitioned to %s\n",
|
|
device->pnp.bus_id,
|
|
acpi_power_state_string(target_state)));
|
|
}
|
|
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(acpi_device_set_power);
|
|
|
|
int acpi_bus_set_power(acpi_handle handle, int state)
|
|
{
|
|
struct acpi_device *device;
|
|
int result;
|
|
|
|
result = acpi_bus_get_device(handle, &device);
|
|
if (result)
|
|
return result;
|
|
|
|
return acpi_device_set_power(device, state);
|
|
}
|
|
EXPORT_SYMBOL(acpi_bus_set_power);
|
|
|
|
int acpi_bus_init_power(struct acpi_device *device)
|
|
{
|
|
int state;
|
|
int result;
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
device->power.state = ACPI_STATE_UNKNOWN;
|
|
if (!acpi_device_is_present(device)) {
|
|
device->flags.initialized = false;
|
|
return -ENXIO;
|
|
}
|
|
|
|
result = acpi_device_get_power(device, &state);
|
|
if (result)
|
|
return result;
|
|
|
|
if (state < ACPI_STATE_D3_COLD && device->power.flags.power_resources) {
|
|
/* Reference count the power resources. */
|
|
result = acpi_power_on_resources(device, state);
|
|
if (result)
|
|
return result;
|
|
|
|
if (state == ACPI_STATE_D0) {
|
|
/*
|
|
* If _PSC is not present and the state inferred from
|
|
* power resources appears to be D0, it still may be
|
|
* necessary to execute _PS0 at this point, because
|
|
* another device using the same power resources may
|
|
* have been put into D0 previously and that's why we
|
|
* see D0 here.
|
|
*/
|
|
result = acpi_dev_pm_explicit_set(device, state);
|
|
if (result)
|
|
return result;
|
|
}
|
|
} else if (state == ACPI_STATE_UNKNOWN) {
|
|
/*
|
|
* No power resources and missing _PSC? Cross fingers and make
|
|
* it D0 in hope that this is what the BIOS put the device into.
|
|
* [We tried to force D0 here by executing _PS0, but that broke
|
|
* Toshiba P870-303 in a nasty way.]
|
|
*/
|
|
state = ACPI_STATE_D0;
|
|
}
|
|
device->power.state = state;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* acpi_device_fix_up_power - Force device with missing _PSC into D0.
|
|
* @device: Device object whose power state is to be fixed up.
|
|
*
|
|
* Devices without power resources and _PSC, but having _PS0 and _PS3 defined,
|
|
* are assumed to be put into D0 by the BIOS. However, in some cases that may
|
|
* not be the case and this function should be used then.
|
|
*/
|
|
int acpi_device_fix_up_power(struct acpi_device *device)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!device->power.flags.power_resources
|
|
&& !device->power.flags.explicit_get
|
|
&& device->power.state == ACPI_STATE_D0)
|
|
ret = acpi_dev_pm_explicit_set(device, ACPI_STATE_D0);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_device_fix_up_power);
|
|
|
|
int acpi_device_update_power(struct acpi_device *device, int *state_p)
|
|
{
|
|
int state;
|
|
int result;
|
|
|
|
if (device->power.state == ACPI_STATE_UNKNOWN) {
|
|
result = acpi_bus_init_power(device);
|
|
if (!result && state_p)
|
|
*state_p = device->power.state;
|
|
|
|
return result;
|
|
}
|
|
|
|
result = acpi_device_get_power(device, &state);
|
|
if (result)
|
|
return result;
|
|
|
|
if (state == ACPI_STATE_UNKNOWN) {
|
|
state = ACPI_STATE_D0;
|
|
result = acpi_device_set_power(device, state);
|
|
if (result)
|
|
return result;
|
|
} else {
|
|
if (device->power.flags.power_resources) {
|
|
/*
|
|
* We don't need to really switch the state, bu we need
|
|
* to update the power resources' reference counters.
|
|
*/
|
|
result = acpi_power_transition(device, state);
|
|
if (result)
|
|
return result;
|
|
}
|
|
device->power.state = state;
|
|
}
|
|
if (state_p)
|
|
*state_p = state;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_device_update_power);
|
|
|
|
int acpi_bus_update_power(acpi_handle handle, int *state_p)
|
|
{
|
|
struct acpi_device *device;
|
|
int result;
|
|
|
|
result = acpi_bus_get_device(handle, &device);
|
|
return result ? result : acpi_device_update_power(device, state_p);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_bus_update_power);
|
|
|
|
bool acpi_bus_power_manageable(acpi_handle handle)
|
|
{
|
|
struct acpi_device *device;
|
|
int result;
|
|
|
|
result = acpi_bus_get_device(handle, &device);
|
|
return result ? false : device->flags.power_manageable;
|
|
}
|
|
EXPORT_SYMBOL(acpi_bus_power_manageable);
|
|
|
|
#ifdef CONFIG_PM
|
|
static DEFINE_MUTEX(acpi_pm_notifier_lock);
|
|
static DEFINE_MUTEX(acpi_pm_notifier_install_lock);
|
|
|
|
void acpi_pm_wakeup_event(struct device *dev)
|
|
{
|
|
pm_wakeup_dev_event(dev, 0, acpi_s2idle_wakeup());
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_pm_wakeup_event);
|
|
|
|
static void acpi_pm_notify_handler(acpi_handle handle, u32 val, void *not_used)
|
|
{
|
|
struct acpi_device *adev;
|
|
|
|
if (val != ACPI_NOTIFY_DEVICE_WAKE)
|
|
return;
|
|
|
|
acpi_handle_debug(handle, "Wake notify\n");
|
|
|
|
adev = acpi_bus_get_acpi_device(handle);
|
|
if (!adev)
|
|
return;
|
|
|
|
mutex_lock(&acpi_pm_notifier_lock);
|
|
|
|
if (adev->wakeup.flags.notifier_present) {
|
|
pm_wakeup_ws_event(adev->wakeup.ws, 0, acpi_s2idle_wakeup());
|
|
if (adev->wakeup.context.func) {
|
|
acpi_handle_debug(handle, "Running %pF for %s\n",
|
|
adev->wakeup.context.func,
|
|
dev_name(adev->wakeup.context.dev));
|
|
adev->wakeup.context.func(&adev->wakeup.context);
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&acpi_pm_notifier_lock);
|
|
|
|
acpi_bus_put_acpi_device(adev);
|
|
}
|
|
|
|
/**
|
|
* acpi_add_pm_notifier - Register PM notify handler for given ACPI device.
|
|
* @adev: ACPI device to add the notify handler for.
|
|
* @dev: Device to generate a wakeup event for while handling the notification.
|
|
* @func: Work function to execute when handling the notification.
|
|
*
|
|
* NOTE: @adev need not be a run-wake or wakeup device to be a valid source of
|
|
* PM wakeup events. For example, wakeup events may be generated for bridges
|
|
* if one of the devices below the bridge is signaling wakeup, even if the
|
|
* bridge itself doesn't have a wakeup GPE associated with it.
|
|
*/
|
|
acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
|
|
void (*func)(struct acpi_device_wakeup_context *context))
|
|
{
|
|
acpi_status status = AE_ALREADY_EXISTS;
|
|
|
|
if (!dev && !func)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
mutex_lock(&acpi_pm_notifier_install_lock);
|
|
|
|
if (adev->wakeup.flags.notifier_present)
|
|
goto out;
|
|
|
|
status = acpi_install_notify_handler(adev->handle, ACPI_SYSTEM_NOTIFY,
|
|
acpi_pm_notify_handler, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
goto out;
|
|
|
|
mutex_lock(&acpi_pm_notifier_lock);
|
|
adev->wakeup.ws = wakeup_source_register(&adev->dev,
|
|
dev_name(&adev->dev));
|
|
adev->wakeup.context.dev = dev;
|
|
adev->wakeup.context.func = func;
|
|
adev->wakeup.flags.notifier_present = true;
|
|
mutex_unlock(&acpi_pm_notifier_lock);
|
|
|
|
out:
|
|
mutex_unlock(&acpi_pm_notifier_install_lock);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* acpi_remove_pm_notifier - Unregister PM notifier from given ACPI device.
|
|
* @adev: ACPI device to remove the notifier from.
|
|
*/
|
|
acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
|
|
{
|
|
acpi_status status = AE_BAD_PARAMETER;
|
|
|
|
mutex_lock(&acpi_pm_notifier_install_lock);
|
|
|
|
if (!adev->wakeup.flags.notifier_present)
|
|
goto out;
|
|
|
|
status = acpi_remove_notify_handler(adev->handle,
|
|
ACPI_SYSTEM_NOTIFY,
|
|
acpi_pm_notify_handler);
|
|
if (ACPI_FAILURE(status))
|
|
goto out;
|
|
|
|
mutex_lock(&acpi_pm_notifier_lock);
|
|
adev->wakeup.context.func = NULL;
|
|
adev->wakeup.context.dev = NULL;
|
|
wakeup_source_unregister(adev->wakeup.ws);
|
|
adev->wakeup.flags.notifier_present = false;
|
|
mutex_unlock(&acpi_pm_notifier_lock);
|
|
|
|
out:
|
|
mutex_unlock(&acpi_pm_notifier_install_lock);
|
|
return status;
|
|
}
|
|
|
|
bool acpi_bus_can_wakeup(acpi_handle handle)
|
|
{
|
|
struct acpi_device *device;
|
|
int result;
|
|
|
|
result = acpi_bus_get_device(handle, &device);
|
|
return result ? false : device->wakeup.flags.valid;
|
|
}
|
|
EXPORT_SYMBOL(acpi_bus_can_wakeup);
|
|
|
|
bool acpi_pm_device_can_wakeup(struct device *dev)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(dev);
|
|
|
|
return adev ? acpi_device_can_wakeup(adev) : false;
|
|
}
|
|
|
|
/**
|
|
* acpi_dev_pm_get_state - Get preferred power state of ACPI device.
|
|
* @dev: Device whose preferred target power state to return.
|
|
* @adev: ACPI device node corresponding to @dev.
|
|
* @target_state: System state to match the resultant device state.
|
|
* @d_min_p: Location to store the highest power state available to the device.
|
|
* @d_max_p: Location to store the lowest power state available to the device.
|
|
*
|
|
* Find the lowest power (highest number) and highest power (lowest number) ACPI
|
|
* device power states that the device can be in while the system is in the
|
|
* state represented by @target_state. Store the integer numbers representing
|
|
* those stats in the memory locations pointed to by @d_max_p and @d_min_p,
|
|
* respectively.
|
|
*
|
|
* Callers must ensure that @dev and @adev are valid pointers and that @adev
|
|
* actually corresponds to @dev before using this function.
|
|
*
|
|
* Returns 0 on success or -ENODATA when one of the ACPI methods fails or
|
|
* returns a value that doesn't make sense. The memory locations pointed to by
|
|
* @d_max_p and @d_min_p are only modified on success.
|
|
*/
|
|
static int acpi_dev_pm_get_state(struct device *dev, struct acpi_device *adev,
|
|
u32 target_state, int *d_min_p, int *d_max_p)
|
|
{
|
|
char method[] = { '_', 'S', '0' + target_state, 'D', '\0' };
|
|
acpi_handle handle = adev->handle;
|
|
unsigned long long ret;
|
|
int d_min, d_max;
|
|
bool wakeup = false;
|
|
bool has_sxd = false;
|
|
acpi_status status;
|
|
|
|
/*
|
|
* If the system state is S0, the lowest power state the device can be
|
|
* in is D3cold, unless the device has _S0W and is supposed to signal
|
|
* wakeup, in which case the return value of _S0W has to be used as the
|
|
* lowest power state available to the device.
|
|
*/
|
|
d_min = ACPI_STATE_D0;
|
|
d_max = ACPI_STATE_D3_COLD;
|
|
|
|
/*
|
|
* If present, _SxD methods return the minimum D-state (highest power
|
|
* state) we can use for the corresponding S-states. Otherwise, the
|
|
* minimum D-state is D0 (ACPI 3.x).
|
|
*/
|
|
if (target_state > ACPI_STATE_S0) {
|
|
/*
|
|
* We rely on acpi_evaluate_integer() not clobbering the integer
|
|
* provided if AE_NOT_FOUND is returned.
|
|
*/
|
|
ret = d_min;
|
|
status = acpi_evaluate_integer(handle, method, NULL, &ret);
|
|
if ((ACPI_FAILURE(status) && status != AE_NOT_FOUND)
|
|
|| ret > ACPI_STATE_D3_COLD)
|
|
return -ENODATA;
|
|
|
|
/*
|
|
* We need to handle legacy systems where D3hot and D3cold are
|
|
* the same and 3 is returned in both cases, so fall back to
|
|
* D3cold if D3hot is not a valid state.
|
|
*/
|
|
if (!adev->power.states[ret].flags.valid) {
|
|
if (ret == ACPI_STATE_D3_HOT)
|
|
ret = ACPI_STATE_D3_COLD;
|
|
else
|
|
return -ENODATA;
|
|
}
|
|
|
|
if (status == AE_OK)
|
|
has_sxd = true;
|
|
|
|
d_min = ret;
|
|
wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid
|
|
&& adev->wakeup.sleep_state >= target_state;
|
|
} else {
|
|
wakeup = adev->wakeup.flags.valid;
|
|
}
|
|
|
|
/*
|
|
* If _PRW says we can wake up the system from the target sleep state,
|
|
* the D-state returned by _SxD is sufficient for that (we assume a
|
|
* wakeup-aware driver if wake is set). Still, if _SxW exists
|
|
* (ACPI 3.x), it should return the maximum (lowest power) D-state that
|
|
* can wake the system. _S0W may be valid, too.
|
|
*/
|
|
if (wakeup) {
|
|
method[3] = 'W';
|
|
status = acpi_evaluate_integer(handle, method, NULL, &ret);
|
|
if (status == AE_NOT_FOUND) {
|
|
/* No _SxW. In this case, the ACPI spec says that we
|
|
* must not go into any power state deeper than the
|
|
* value returned from _SxD.
|
|
*/
|
|
if (has_sxd && target_state > ACPI_STATE_S0)
|
|
d_max = d_min;
|
|
} else if (ACPI_SUCCESS(status) && ret <= ACPI_STATE_D3_COLD) {
|
|
/* Fall back to D3cold if ret is not a valid state. */
|
|
if (!adev->power.states[ret].flags.valid)
|
|
ret = ACPI_STATE_D3_COLD;
|
|
|
|
d_max = ret > d_min ? ret : d_min;
|
|
} else {
|
|
return -ENODATA;
|
|
}
|
|
}
|
|
|
|
if (d_min_p)
|
|
*d_min_p = d_min;
|
|
|
|
if (d_max_p)
|
|
*d_max_p = d_max;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* acpi_pm_device_sleep_state - Get preferred power state of ACPI device.
|
|
* @dev: Device whose preferred target power state to return.
|
|
* @d_min_p: Location to store the upper limit of the allowed states range.
|
|
* @d_max_in: Deepest low-power state to take into consideration.
|
|
* Return value: Preferred power state of the device on success, -ENODEV
|
|
* if there's no 'struct acpi_device' for @dev, -EINVAL if @d_max_in is
|
|
* incorrect, or -ENODATA on ACPI method failure.
|
|
*
|
|
* The caller must ensure that @dev is valid before using this function.
|
|
*/
|
|
int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in)
|
|
{
|
|
struct acpi_device *adev;
|
|
int ret, d_min, d_max;
|
|
|
|
if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3_COLD)
|
|
return -EINVAL;
|
|
|
|
if (d_max_in > ACPI_STATE_D2) {
|
|
enum pm_qos_flags_status stat;
|
|
|
|
stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF);
|
|
if (stat == PM_QOS_FLAGS_ALL)
|
|
d_max_in = ACPI_STATE_D2;
|
|
}
|
|
|
|
adev = ACPI_COMPANION(dev);
|
|
if (!adev) {
|
|
dev_dbg(dev, "ACPI companion missing in %s!\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = acpi_dev_pm_get_state(dev, adev, acpi_target_system_state(),
|
|
&d_min, &d_max);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (d_max_in < d_min)
|
|
return -EINVAL;
|
|
|
|
if (d_max > d_max_in) {
|
|
for (d_max = d_max_in; d_max > d_min; d_max--) {
|
|
if (adev->power.states[d_max].flags.valid)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (d_min_p)
|
|
*d_min_p = d_min;
|
|
|
|
return d_max;
|
|
}
|
|
EXPORT_SYMBOL(acpi_pm_device_sleep_state);
|
|
|
|
/**
|
|
* acpi_pm_notify_work_func - ACPI devices wakeup notification work function.
|
|
* @context: Device wakeup context.
|
|
*/
|
|
static void acpi_pm_notify_work_func(struct acpi_device_wakeup_context *context)
|
|
{
|
|
struct device *dev = context->dev;
|
|
|
|
if (dev) {
|
|
pm_wakeup_event(dev, 0);
|
|
pm_request_resume(dev);
|
|
}
|
|
}
|
|
|
|
static DEFINE_MUTEX(acpi_wakeup_lock);
|
|
|
|
static int __acpi_device_wakeup_enable(struct acpi_device *adev,
|
|
u32 target_state)
|
|
{
|
|
struct acpi_device_wakeup *wakeup = &adev->wakeup;
|
|
acpi_status status;
|
|
int error = 0;
|
|
|
|
mutex_lock(&acpi_wakeup_lock);
|
|
|
|
if (wakeup->enable_count >= INT_MAX) {
|
|
acpi_handle_info(adev->handle, "Wakeup enable count out of bounds!\n");
|
|
goto out;
|
|
}
|
|
if (wakeup->enable_count > 0)
|
|
goto inc;
|
|
|
|
error = acpi_enable_wakeup_device_power(adev, target_state);
|
|
if (error)
|
|
goto out;
|
|
|
|
status = acpi_enable_gpe(wakeup->gpe_device, wakeup->gpe_number);
|
|
if (ACPI_FAILURE(status)) {
|
|
acpi_disable_wakeup_device_power(adev);
|
|
error = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
inc:
|
|
wakeup->enable_count++;
|
|
|
|
out:
|
|
mutex_unlock(&acpi_wakeup_lock);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* acpi_device_wakeup_enable - Enable wakeup functionality for device.
|
|
* @adev: ACPI device to enable wakeup functionality for.
|
|
* @target_state: State the system is transitioning into.
|
|
*
|
|
* Enable the GPE associated with @adev so that it can generate wakeup signals
|
|
* for the device in response to external (remote) events and enable wakeup
|
|
* power for it.
|
|
*
|
|
* Callers must ensure that @adev is a valid ACPI device node before executing
|
|
* this function.
|
|
*/
|
|
static int acpi_device_wakeup_enable(struct acpi_device *adev, u32 target_state)
|
|
{
|
|
return __acpi_device_wakeup_enable(adev, target_state);
|
|
}
|
|
|
|
/**
|
|
* acpi_device_wakeup_disable - Disable wakeup functionality for device.
|
|
* @adev: ACPI device to disable wakeup functionality for.
|
|
*
|
|
* Disable the GPE associated with @adev and disable wakeup power for it.
|
|
*
|
|
* Callers must ensure that @adev is a valid ACPI device node before executing
|
|
* this function.
|
|
*/
|
|
static void acpi_device_wakeup_disable(struct acpi_device *adev)
|
|
{
|
|
struct acpi_device_wakeup *wakeup = &adev->wakeup;
|
|
|
|
mutex_lock(&acpi_wakeup_lock);
|
|
|
|
if (!wakeup->enable_count)
|
|
goto out;
|
|
|
|
acpi_disable_gpe(wakeup->gpe_device, wakeup->gpe_number);
|
|
acpi_disable_wakeup_device_power(adev);
|
|
|
|
wakeup->enable_count--;
|
|
|
|
out:
|
|
mutex_unlock(&acpi_wakeup_lock);
|
|
}
|
|
|
|
/**
|
|
* acpi_pm_set_device_wakeup - Enable/disable remote wakeup for given device.
|
|
* @dev: Device to enable/disable to generate wakeup events.
|
|
* @enable: Whether to enable or disable the wakeup functionality.
|
|
*/
|
|
int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
|
|
{
|
|
struct acpi_device *adev;
|
|
int error;
|
|
|
|
adev = ACPI_COMPANION(dev);
|
|
if (!adev) {
|
|
dev_dbg(dev, "ACPI companion missing in %s!\n", __func__);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!acpi_device_can_wakeup(adev))
|
|
return -EINVAL;
|
|
|
|
if (!enable) {
|
|
acpi_device_wakeup_disable(adev);
|
|
dev_dbg(dev, "Wakeup disabled by ACPI\n");
|
|
return 0;
|
|
}
|
|
|
|
error = __acpi_device_wakeup_enable(adev, acpi_target_system_state());
|
|
if (!error)
|
|
dev_dbg(dev, "Wakeup enabled by ACPI\n");
|
|
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_pm_set_device_wakeup);
|
|
|
|
/**
|
|
* acpi_dev_pm_low_power - Put ACPI device into a low-power state.
|
|
* @dev: Device to put into a low-power state.
|
|
* @adev: ACPI device node corresponding to @dev.
|
|
* @system_state: System state to choose the device state for.
|
|
*/
|
|
static int acpi_dev_pm_low_power(struct device *dev, struct acpi_device *adev,
|
|
u32 system_state)
|
|
{
|
|
int ret, state;
|
|
|
|
if (!acpi_device_power_manageable(adev))
|
|
return 0;
|
|
|
|
ret = acpi_dev_pm_get_state(dev, adev, system_state, NULL, &state);
|
|
return ret ? ret : acpi_device_set_power(adev, state);
|
|
}
|
|
|
|
/**
|
|
* acpi_dev_pm_full_power - Put ACPI device into the full-power state.
|
|
* @adev: ACPI device node to put into the full-power state.
|
|
*/
|
|
static int acpi_dev_pm_full_power(struct acpi_device *adev)
|
|
{
|
|
return acpi_device_power_manageable(adev) ?
|
|
acpi_device_set_power(adev, ACPI_STATE_D0) : 0;
|
|
}
|
|
|
|
/**
|
|
* acpi_dev_suspend - Put device into a low-power state using ACPI.
|
|
* @dev: Device to put into a low-power state.
|
|
* @wakeup: Whether or not to enable wakeup for the device.
|
|
*
|
|
* Put the given device into a low-power state using the standard ACPI
|
|
* mechanism. Set up remote wakeup if desired, choose the state to put the
|
|
* device into (this checks if remote wakeup is expected to work too), and set
|
|
* the power state of the device.
|
|
*/
|
|
int acpi_dev_suspend(struct device *dev, bool wakeup)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(dev);
|
|
u32 target_state = acpi_target_system_state();
|
|
int error;
|
|
|
|
if (!adev)
|
|
return 0;
|
|
|
|
if (wakeup && acpi_device_can_wakeup(adev)) {
|
|
error = acpi_device_wakeup_enable(adev, target_state);
|
|
if (error)
|
|
return -EAGAIN;
|
|
} else {
|
|
wakeup = false;
|
|
}
|
|
|
|
error = acpi_dev_pm_low_power(dev, adev, target_state);
|
|
if (error && wakeup)
|
|
acpi_device_wakeup_disable(adev);
|
|
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_dev_suspend);
|
|
|
|
/**
|
|
* acpi_dev_resume - Put device into the full-power state using ACPI.
|
|
* @dev: Device to put into the full-power state.
|
|
*
|
|
* Put the given device into the full-power state using the standard ACPI
|
|
* mechanism. Set the power state of the device to ACPI D0 and disable wakeup.
|
|
*/
|
|
int acpi_dev_resume(struct device *dev)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(dev);
|
|
int error;
|
|
|
|
if (!adev)
|
|
return 0;
|
|
|
|
error = acpi_dev_pm_full_power(adev);
|
|
acpi_device_wakeup_disable(adev);
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_dev_resume);
|
|
|
|
/**
|
|
* acpi_subsys_runtime_suspend - Suspend device using ACPI.
|
|
* @dev: Device to suspend.
|
|
*
|
|
* Carry out the generic runtime suspend procedure for @dev and use ACPI to put
|
|
* it into a runtime low-power state.
|
|
*/
|
|
int acpi_subsys_runtime_suspend(struct device *dev)
|
|
{
|
|
int ret = pm_generic_runtime_suspend(dev);
|
|
return ret ? ret : acpi_dev_suspend(dev, true);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_runtime_suspend);
|
|
|
|
/**
|
|
* acpi_subsys_runtime_resume - Resume device using ACPI.
|
|
* @dev: Device to Resume.
|
|
*
|
|
* Use ACPI to put the given device into the full-power state and carry out the
|
|
* generic runtime resume procedure for it.
|
|
*/
|
|
int acpi_subsys_runtime_resume(struct device *dev)
|
|
{
|
|
int ret = acpi_dev_resume(dev);
|
|
return ret ? ret : pm_generic_runtime_resume(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_runtime_resume);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static bool acpi_dev_needs_resume(struct device *dev, struct acpi_device *adev)
|
|
{
|
|
u32 sys_target = acpi_target_system_state();
|
|
int ret, state;
|
|
|
|
if (!pm_runtime_suspended(dev) || !adev || (adev->wakeup.flags.valid &&
|
|
device_may_wakeup(dev) != !!adev->wakeup.prepare_count))
|
|
return true;
|
|
|
|
if (sys_target == ACPI_STATE_S0)
|
|
return false;
|
|
|
|
if (adev->power.flags.dsw_present)
|
|
return true;
|
|
|
|
ret = acpi_dev_pm_get_state(dev, adev, sys_target, NULL, &state);
|
|
if (ret)
|
|
return true;
|
|
|
|
return state != adev->power.state;
|
|
}
|
|
|
|
/**
|
|
* acpi_subsys_prepare - Prepare device for system transition to a sleep state.
|
|
* @dev: Device to prepare.
|
|
*/
|
|
int acpi_subsys_prepare(struct device *dev)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(dev);
|
|
|
|
if (dev->driver && dev->driver->pm && dev->driver->pm->prepare) {
|
|
int ret = dev->driver->pm->prepare(dev);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (!ret && dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_PREPARE))
|
|
return 0;
|
|
}
|
|
|
|
return !acpi_dev_needs_resume(dev, adev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_prepare);
|
|
|
|
/**
|
|
* acpi_subsys_complete - Finalize device's resume during system resume.
|
|
* @dev: Device to handle.
|
|
*/
|
|
void acpi_subsys_complete(struct device *dev)
|
|
{
|
|
pm_generic_complete(dev);
|
|
/*
|
|
* If the device had been runtime-suspended before the system went into
|
|
* the sleep state it is going out of and it has never been resumed till
|
|
* now, resume it in case the firmware powered it up.
|
|
*/
|
|
if (pm_runtime_suspended(dev) && pm_resume_via_firmware())
|
|
pm_request_resume(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_complete);
|
|
|
|
/**
|
|
* acpi_subsys_suspend - Run the device driver's suspend callback.
|
|
* @dev: Device to handle.
|
|
*
|
|
* Follow PCI and resume devices from runtime suspend before running their
|
|
* system suspend callbacks, unless the driver can cope with runtime-suspended
|
|
* devices during system suspend and there are no ACPI-specific reasons for
|
|
* resuming them.
|
|
*/
|
|
int acpi_subsys_suspend(struct device *dev)
|
|
{
|
|
if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) ||
|
|
acpi_dev_needs_resume(dev, ACPI_COMPANION(dev)))
|
|
pm_runtime_resume(dev);
|
|
|
|
return pm_generic_suspend(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_suspend);
|
|
|
|
/**
|
|
* acpi_subsys_suspend_late - Suspend device using ACPI.
|
|
* @dev: Device to suspend.
|
|
*
|
|
* Carry out the generic late suspend procedure for @dev and use ACPI to put
|
|
* it into a low-power state during system transition into a sleep state.
|
|
*/
|
|
int acpi_subsys_suspend_late(struct device *dev)
|
|
{
|
|
int ret;
|
|
|
|
if (dev_pm_smart_suspend_and_suspended(dev))
|
|
return 0;
|
|
|
|
ret = pm_generic_suspend_late(dev);
|
|
return ret ? ret : acpi_dev_suspend(dev, device_may_wakeup(dev));
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_suspend_late);
|
|
|
|
/**
|
|
* acpi_subsys_suspend_noirq - Run the device driver's "noirq" suspend callback.
|
|
* @dev: Device to suspend.
|
|
*/
|
|
int acpi_subsys_suspend_noirq(struct device *dev)
|
|
{
|
|
int ret;
|
|
|
|
if (dev_pm_smart_suspend_and_suspended(dev)) {
|
|
dev->power.may_skip_resume = true;
|
|
return 0;
|
|
}
|
|
|
|
ret = pm_generic_suspend_noirq(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* If the target system sleep state is suspend-to-idle, it is sufficient
|
|
* to check whether or not the device's wakeup settings are good for
|
|
* runtime PM. Otherwise, the pm_resume_via_firmware() check will cause
|
|
* acpi_subsys_complete() to take care of fixing up the device's state
|
|
* anyway, if need be.
|
|
*/
|
|
dev->power.may_skip_resume = device_may_wakeup(dev) ||
|
|
!device_can_wakeup(dev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_suspend_noirq);
|
|
|
|
/**
|
|
* acpi_subsys_resume_noirq - Run the device driver's "noirq" resume callback.
|
|
* @dev: Device to handle.
|
|
*/
|
|
static int acpi_subsys_resume_noirq(struct device *dev)
|
|
{
|
|
if (dev_pm_may_skip_resume(dev))
|
|
return 0;
|
|
|
|
/*
|
|
* Devices with DPM_FLAG_SMART_SUSPEND may be left in runtime suspend
|
|
* during system suspend, so update their runtime PM status to "active"
|
|
* as they will be put into D0 going forward.
|
|
*/
|
|
if (dev_pm_smart_suspend_and_suspended(dev))
|
|
pm_runtime_set_active(dev);
|
|
|
|
return pm_generic_resume_noirq(dev);
|
|
}
|
|
|
|
/**
|
|
* acpi_subsys_resume_early - Resume device using ACPI.
|
|
* @dev: Device to Resume.
|
|
*
|
|
* Use ACPI to put the given device into the full-power state and carry out the
|
|
* generic early resume procedure for it during system transition into the
|
|
* working state.
|
|
*/
|
|
static int acpi_subsys_resume_early(struct device *dev)
|
|
{
|
|
int ret = acpi_dev_resume(dev);
|
|
return ret ? ret : pm_generic_resume_early(dev);
|
|
}
|
|
|
|
/**
|
|
* acpi_subsys_freeze - Run the device driver's freeze callback.
|
|
* @dev: Device to handle.
|
|
*/
|
|
int acpi_subsys_freeze(struct device *dev)
|
|
{
|
|
/*
|
|
* Resume all runtime-suspended devices before creating a snapshot
|
|
* image of system memory, because the restore kernel generally cannot
|
|
* be expected to always handle them consistently and they need to be
|
|
* put into the runtime-active metastate during system resume anyway,
|
|
* so it is better to ensure that the state saved in the image will be
|
|
* always consistent with that.
|
|
*/
|
|
pm_runtime_resume(dev);
|
|
|
|
return pm_generic_freeze(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_freeze);
|
|
|
|
/**
|
|
* acpi_subsys_restore_early - Restore device using ACPI.
|
|
* @dev: Device to restore.
|
|
*/
|
|
int acpi_subsys_restore_early(struct device *dev)
|
|
{
|
|
int ret = acpi_dev_resume(dev);
|
|
return ret ? ret : pm_generic_restore_early(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_restore_early);
|
|
|
|
/**
|
|
* acpi_subsys_poweroff - Run the device driver's poweroff callback.
|
|
* @dev: Device to handle.
|
|
*
|
|
* Follow PCI and resume devices from runtime suspend before running their
|
|
* system poweroff callbacks, unless the driver can cope with runtime-suspended
|
|
* devices during system suspend and there are no ACPI-specific reasons for
|
|
* resuming them.
|
|
*/
|
|
int acpi_subsys_poweroff(struct device *dev)
|
|
{
|
|
if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) ||
|
|
acpi_dev_needs_resume(dev, ACPI_COMPANION(dev)))
|
|
pm_runtime_resume(dev);
|
|
|
|
return pm_generic_poweroff(dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_subsys_poweroff);
|
|
|
|
/**
|
|
* acpi_subsys_poweroff_late - Run the device driver's poweroff callback.
|
|
* @dev: Device to handle.
|
|
*
|
|
* Carry out the generic late poweroff procedure for @dev and use ACPI to put
|
|
* it into a low-power state during system transition into a sleep state.
|
|
*/
|
|
static int acpi_subsys_poweroff_late(struct device *dev)
|
|
{
|
|
int ret;
|
|
|
|
if (dev_pm_smart_suspend_and_suspended(dev))
|
|
return 0;
|
|
|
|
ret = pm_generic_poweroff_late(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return acpi_dev_suspend(dev, device_may_wakeup(dev));
|
|
}
|
|
|
|
/**
|
|
* acpi_subsys_poweroff_noirq - Run the driver's "noirq" poweroff callback.
|
|
* @dev: Device to suspend.
|
|
*/
|
|
static int acpi_subsys_poweroff_noirq(struct device *dev)
|
|
{
|
|
if (dev_pm_smart_suspend_and_suspended(dev))
|
|
return 0;
|
|
|
|
return pm_generic_poweroff_noirq(dev);
|
|
}
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
static struct dev_pm_domain acpi_general_pm_domain = {
|
|
.ops = {
|
|
.runtime_suspend = acpi_subsys_runtime_suspend,
|
|
.runtime_resume = acpi_subsys_runtime_resume,
|
|
#ifdef CONFIG_PM_SLEEP
|
|
.prepare = acpi_subsys_prepare,
|
|
.complete = acpi_subsys_complete,
|
|
.suspend = acpi_subsys_suspend,
|
|
.suspend_late = acpi_subsys_suspend_late,
|
|
.suspend_noirq = acpi_subsys_suspend_noirq,
|
|
.resume_noirq = acpi_subsys_resume_noirq,
|
|
.resume_early = acpi_subsys_resume_early,
|
|
.freeze = acpi_subsys_freeze,
|
|
.poweroff = acpi_subsys_poweroff,
|
|
.poweroff_late = acpi_subsys_poweroff_late,
|
|
.poweroff_noirq = acpi_subsys_poweroff_noirq,
|
|
.restore_early = acpi_subsys_restore_early,
|
|
#endif
|
|
},
|
|
};
|
|
|
|
/**
|
|
* acpi_dev_pm_detach - Remove ACPI power management from the device.
|
|
* @dev: Device to take care of.
|
|
* @power_off: Whether or not to try to remove power from the device.
|
|
*
|
|
* Remove the device from the general ACPI PM domain and remove its wakeup
|
|
* notifier. If @power_off is set, additionally remove power from the device if
|
|
* possible.
|
|
*
|
|
* Callers must ensure proper synchronization of this function with power
|
|
* management callbacks.
|
|
*/
|
|
static void acpi_dev_pm_detach(struct device *dev, bool power_off)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(dev);
|
|
|
|
if (adev && dev->pm_domain == &acpi_general_pm_domain) {
|
|
dev_pm_domain_set(dev, NULL);
|
|
acpi_remove_pm_notifier(adev);
|
|
if (power_off) {
|
|
/*
|
|
* If the device's PM QoS resume latency limit or flags
|
|
* have been exposed to user space, they have to be
|
|
* hidden at this point, so that they don't affect the
|
|
* choice of the low-power state to put the device into.
|
|
*/
|
|
dev_pm_qos_hide_latency_limit(dev);
|
|
dev_pm_qos_hide_flags(dev);
|
|
acpi_device_wakeup_disable(adev);
|
|
acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* acpi_dev_pm_attach - Prepare device for ACPI power management.
|
|
* @dev: Device to prepare.
|
|
* @power_on: Whether or not to power on the device.
|
|
*
|
|
* If @dev has a valid ACPI handle that has a valid struct acpi_device object
|
|
* attached to it, install a wakeup notification handler for the device and
|
|
* add it to the general ACPI PM domain. If @power_on is set, the device will
|
|
* be put into the ACPI D0 state before the function returns.
|
|
*
|
|
* This assumes that the @dev's bus type uses generic power management callbacks
|
|
* (or doesn't use any power management callbacks at all).
|
|
*
|
|
* Callers must ensure proper synchronization of this function with power
|
|
* management callbacks.
|
|
*/
|
|
int acpi_dev_pm_attach(struct device *dev, bool power_on)
|
|
{
|
|
/*
|
|
* Skip devices whose ACPI companions match the device IDs below,
|
|
* because they require special power management handling incompatible
|
|
* with the generic ACPI PM domain.
|
|
*/
|
|
static const struct acpi_device_id special_pm_ids[] = {
|
|
{"PNP0C0B", }, /* Generic ACPI fan */
|
|
{"INT3404", }, /* Fan */
|
|
{}
|
|
};
|
|
struct acpi_device *adev = ACPI_COMPANION(dev);
|
|
|
|
if (!adev || !acpi_match_device_ids(adev, special_pm_ids))
|
|
return 0;
|
|
|
|
/*
|
|
* Only attach the power domain to the first device if the
|
|
* companion is shared by multiple. This is to prevent doing power
|
|
* management twice.
|
|
*/
|
|
if (!acpi_device_is_first_physical_node(adev, dev))
|
|
return 0;
|
|
|
|
acpi_add_pm_notifier(adev, dev, acpi_pm_notify_work_func);
|
|
dev_pm_domain_set(dev, &acpi_general_pm_domain);
|
|
if (power_on) {
|
|
acpi_dev_pm_full_power(adev);
|
|
acpi_device_wakeup_disable(adev);
|
|
}
|
|
|
|
dev->pm_domain->detach = acpi_dev_pm_detach;
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL_GPL(acpi_dev_pm_attach);
|
|
#endif /* CONFIG_PM */
|