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authorMichel Dänzer <michel.daenzer@amd.com>2015-05-26 17:53:38 +0900
committerDaniel Vetter <daniel.vetter@ffwll.ch>2015-05-27 13:00:08 +0200
commit5ceecb2fa720c01a97e6fa2353c2b8f1e8d69f1f (patch)
tree4a9ad864ed2ff736c7138fa997875b7944601d6e /Documentation
parent60f207a5b6d8f23c2e8388b415e8d5c7311cc79d (diff)
downloadkernel-5ceecb2fa720c01a97e6fa2353c2b8f1e8d69f1f.tar.gz
drm: Fix off-by-one in vblank hardware counter wraparound handling
dev->max_vblank_count contains the largest value that can be represented by the hardware counter. When the hardware counter wraps around, we have to add that value + 1 to get the same value as if the hardware counter didn't wrap around. Signed-off-by: Michel Dänzer <michel.daenzer@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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