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video: fbdev: fbmem: fix pointer reference to null device field 

In function do_remove_conflicting_framebuffers, if device is NULL, there
will be null pointer reference. The patch add a check to the if expression.

Signed-off-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Acked-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220210065824.368355-1-zhouzhouyi@gmail.com
This commit is contained in:
Zhouyi Zhou 2022-02-10 14:58:24 +08:00 committed by Helge Deller
parent 16a54d4ee7
commit d6cd978f7e
1 changed files with 1 additions and 1 deletions
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2
drivers/video/fbdev/core/fbmem.c
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@ -1579,7 +1579,7 @@ static void do_remove_conflicting_framebuffers(struct apertures_struct *a,
* If it's not a platform device, at least print a warning. A
* fix would add code to remove the device from the system.
*/
if (dev_is_platform(device)) {
if (device && dev_is_platform(device)) {
registered_fb[i]->forced_out = true;
platform_device_unregister(to_platform_device(device));
} else {