diff options
| author | Tong Zhang | 2022-01-23 01:10:04 -0800 |
|---|---|---|
| committer | Hans de Goede | 2022-01-26 15:25:50 +0100 |
| commit | 7fde14d705985dd933a3d916d39daa72b1668098 (patch) | |
| tree | 6113a8ffa9203d7f7aba5df57289e6d181fdd80e /ipc | |
| parent | 76cea3d95513fe40000d06a3719c4bb6b53275e2 (diff) | |
drm/privacy-screen: honor acpi=off in detect_thinkpad_privacy_screen
when acpi=off is provided in bootarg, kernel crash with
[ 1.252739] BUG: kernel NULL pointer dereference, address: 0000000000000018
[ 1.258308] Call Trace:
[ 1.258490] ? acpi_walk_namespace+0x147/0x147
[ 1.258770] acpi_get_devices+0xe4/0x137
[ 1.258921] ? drm_core_init+0xc0/0xc0 [drm]
[ 1.259108] detect_thinkpad_privacy_screen+0x5e/0xa8 [drm]
[ 1.259337] drm_privacy_screen_lookup_init+0xe/0xe85 [drm]
The reason is that acpi_walk_namespace expects acpi related stuff
initialized but in fact it wouldn't when acpi is set to off. In this case
we should honor acpi=off in detect_thinkpad_privacy_screen().
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220123091004.763775-1-ztong0001@gmail.com
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions