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| author |   Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-12-11 23:42:24 +0100 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2012-12-14 10:45:23 -0500 |
| commit | 9af20792124850369e764965690b99b20623dfc4 (patch) | |
| tree | f8cea8c80e4ae11b414d9e0f529ade0c51201e6f /drivers/gpu | |
| parent | drm/radeon: make indirect register access concurrency-safe (diff) | |
| download | linux-dev-9af20792124850369e764965690b99b20623dfc4.tar.xz linux-dev-9af20792124850369e764965690b99b20623dfc4.zip | |
drm/radeon: fix fence locking in the pageflip callback
We need to hold bdev->fence_lock while grabbing a reference to
the fence, to prevent concurrent clearing/changing of the
ttm_bo->sync_obj field.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_display.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index bfa2a6015727..310c0e5254ba 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -378,8 +378,12 @@ static int radeon_crtc_page_flip(struct drm_crtc *crtc, work->old_rbo = rbo; obj = new_radeon_fb->obj; rbo = gem_to_radeon_bo(obj); + + spin_lock(&rbo->tbo.bdev->fence_lock); if (rbo->tbo.sync_obj) work->fence = radeon_fence_ref(rbo->tbo.sync_obj); + spin_unlock(&rbo->tbo.bdev->fence_lock); + INIT_WORK(&work->work, radeon_unpin_work_func); /* We borrow the event spin lock for protecting unpin_work */ |