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drm/debugfs: fix plain echo to connector "force" attribute

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[ Upstream commit c704b17071c4dc571dca3af4e4151dac51de081a ]

Using plain echo to set the "force" connector attribute fails with
-EINVAL, because echo appends a newline to the output.

Replace strcmp with sysfs_streq to also accept strings that end with a
newline.

v2: use sysfs_streq instead of stripping trailing whitespace

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170817104307.17124-1-m.tretter@pengutronix.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Michael Tretter 2017-08-17 12:43:07 +02:00 committed by Greg Kroah-Hartman
parent 459863b756
commit 1bed3b8744
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/drm_debugfs.c
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@ -265,13 +265,13 @@ static ssize_t connector_write(struct file *file, const char __user *ubuf,
buf[len] = '\0';
if (!strcmp(buf, "on"))
if (sysfs_streq(buf, "on"))
connector->force = DRM_FORCE_ON;
else if (!strcmp(buf, "digital"))
else if (sysfs_streq(buf, "digital"))
connector->force = DRM_FORCE_ON_DIGITAL;
else if (!strcmp(buf, "off"))
else if (sysfs_streq(buf, "off"))
connector->force = DRM_FORCE_OFF;
else if (!strcmp(buf, "unspecified"))
else if (sysfs_streq(buf, "unspecified"))
connector->force = DRM_FORCE_UNSPECIFIED;
else
return -EINVAL;