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thunderbolt: Handle NULL boot ACL entries properly

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If the boot ACL entry is already NULL we should not fill in the upper
two DWs with 0xfffffffff. Otherwise they are not shown as empty entries
when the sysfs attribute is read.

Fixes: 9aaa3b8b4c ("thunderbolt: Add support for preboot ACL")
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Yehezkel Bernat <yehezkelshb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mika Westerberg 2018-05-15 16:04:25 +03:00 committed by Greg Kroah-Hartman
parent 6da6c0db53
commit dd010bd7af
1 changed files with 1 additions and 1 deletions
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2
drivers/thunderbolt/icm.c
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@ -1255,7 +1255,7 @@ static int icm_ar_get_boot_acl(struct tb *tb, uuid_t *uuids, size_t nuuids)
/* Map empty entries to null UUID */
uuid[0] = 0;
uuid[1] = 0;
} else {
} else if (uuid[0] != 0 || uuid[1] != 0) {
/* Upper two DWs are always one's */
uuid[2] = 0xffffffff;
uuid[3] = 0xffffffff;