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drm/radeon: update lockup tracking when scheduling in empty ring 

There might be issue with lockup detection when scheduling on an
empty ring that have been sitting idle for a while. Thus update
the lockup tracking data when scheduling new work in an empty ring.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Tested-by: Andy Lutomirski <luto@amacapital.net>
Cc: stable@vger.kernel.org
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jerome Glisse 2013-06-19 10:02:28 -04:00 committed by Alex Deucher
parent c139b1ee4e
commit 8444d5c695
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/radeon/radeon_ring.c
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@ -402,6 +402,13 @@ int radeon_ring_alloc(struct radeon_device *rdev, struct radeon_ring *ring, unsi
return -ENOMEM;
/* Align requested size with padding so unlock_commit can
* pad safely */
radeon_ring_free_size(rdev, ring);
if (ring->ring_free_dw == (ring->ring_size / 4)) {
/* This is an empty ring update lockup info to avoid
* false positive.
*/
radeon_ring_lockup_update(ring);
}
ndw = (ndw + ring->align_mask) & ~ring->align_mask;
while (ndw > (ring->ring_free_dw - 1)) {
radeon_ring_free_size(rdev, ring);