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| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2019-08-20 12:58:37 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-08-21 22:18:11 -0500 |
| commit | 7a235125959cffa28c20059ff1cb8725571fcf9f (patch) | |
| tree | 7a7b9f5d7161e150a8e0f33ccbe7e62c923d5c31 /drivers/gpu/drm/drm_drv.c | |
| parent | 6da6c2792808d767012389d6d83cf9d11a2c8256 (diff) | |
| download | linux-7a235125959cffa28c20059ff1cb8725571fcf9f.tar.gz linux-7a235125959cffa28c20059ff1cb8725571fcf9f.tar.bz2 linux-7a235125959cffa28c20059ff1cb8725571fcf9f.zip | |
drm/amd/display: Check return code for CRC drm_crtc_vblank_get
[Why]
The call to drm_crtc_vblank_get can fail if vblank is disabled and
we try to increment the reference.
Since drm_crtc_vblank_get internally drops the reference when it fails
it means the subsequent drm_crtc_vblank_put(...) when closing the file
drops a zero reference.
This was found via igt@kms_plane@pixel-format-pipe-A-planes.
[How]
Check the return code and return it on failure.
We wouldn't have been able to enable CRC reading anyway since vblank
wasn't enabled.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: David Francis <David.Francis@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/drm_drv.c')
0 files changed, 0 insertions, 0 deletions