raspi/linux
1
0
Fork 1
mirror of https://github.com/raspberrypi/linux.git synced 2025-12-06 10:00:17 +00:00
Code Issues Projects Releases Wiki Activity

video: bcm2708_fb: Disable FB if no displays found

Browse Source 
If the firmware hasn't detected a display, the driver would assume
one display was available, but because it had failed to retrieve the
display size it would try to allocate a zero-sized buffer.

Avoid the allocation failure by bailing out early if no display is
found.

See: https://github.com/raspberrypi/linux/issues/3598

Signed-off-by: Phil Elwell <phil@raspberrypi.com>
This commit is contained in:
Phil Elwell
2020-05-05 19:45:41 +01:00
committed by popcornmix
parent 108c641476
commit e7f934bccf
1 changed files with 2 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/video/fbdev/bcm2708_fb.c
View File

@@ -1092,10 +1092,9 @@ static int bcm2708_fb_probe(struct platform_device *dev)
* set one display
*/
if (ret || num_displays == 0) {
num_displays = 1;
dev_err(&dev->dev,
"Unable to determine number of FB's. Assuming 1\n");
ret = 0;
"Unable to determine number of FBs. Disabling driver.\n");
return -ENOENT;
} else {
fbdev->firmware_supports_multifb = 1;
}