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drm/radeon/pm: Handle failure of drm_vblank_get. 

Make sure that drm_vblank_get/put() stay balanced in
case drm_vblank_get fails, by skipping the corresponding
put.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: michel@daenzer.net
Cc: dri-devel@lists.freedesktop.org
Cc: alexander.deucher@amd.com
Cc: christian.koenig@amd.com
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Mario Kleiner 2016-02-12 20:30:31 +01:00 committed by Dave Airlie
parent bb74fc1bf3
commit e0b34e3857
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/radeon/radeon_pm.c
View File

@ -276,8 +276,12 @@ static void radeon_pm_set_clocks(struct radeon_device *rdev)
if (rdev->irq.installed) {
for (i = 0; i < rdev->num_crtc; i++) {
if (rdev->pm.active_crtcs & (1 << i)) {
rdev->pm.req_vblank |= (1 << i);
drm_vblank_get(rdev->ddev, i);
/* This can fail if a modeset is in progress */
if (drm_vblank_get(rdev->ddev, i) == 0)
rdev->pm.req_vblank |= (1 << i);
else
DRM_DEBUG_DRIVER("crtc %d no vblank, can glitch\n",
i);
}
}
}