From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Fri, 7 Aug 2015 10:31:17 +0000 (+0200)
Subject: drm/vblank: Use u32 consistently for vblank counters
X-Git-Tag: omap-for-v4.3/fixes-merge-window~131^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=209e4dbc8dcdb2b1839f18fd1cf07ec7bedadf4d;p=pandora-kernel.git

drm/vblank: Use u32 consistently for vblank counters

In

commit 99264a61dfcda41d86d0960cf2d4c0fc2758a773
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Apr 15 19:34:43 2015 +0200

    drm/vblank: Fixup and document timestamp update/read barriers

I've switched vblank->count from atomic_t to unsigned long and
accidentally created an integer comparison bug in
drm_vblank_count_and_time since vblanke->count might overflow the u32
local copy and hence the retry loop never succeed.

Fix this by consistently using u32.

Cc: Michel Dänzer <michel@daenzer.net>
Reported-by: Michel Dänzer <michel@daenzer.net>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
---

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