From: Michel Dänzer <michel.daenzer@amd.com>
Date: Tue, 26 May 2015 08:53:38 +0000 (+0900)
Subject: drm: Fix off-by-one in vblank hardware counter wraparound handling
X-Git-Tag: omap-for-v4.2/fixes-rc1^2~17^2~41^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5ceecb2fa720c01a97e6fa2353c2b8f1e8d69f1f;p=pandora-kernel.git

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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