On Fri, Aug 07, 2015 at 12:31:17PM +0200, Daniel Vetter wrote:
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 barriersI'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 Signed-off-by: Daniel Vetter daniel.vetter@intel.com
drivers/gpu/drm/drm_irq.c | 2 +- include/drm/drmP.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
Reviewed-by: Thierry Reding treding@nvidia.com