drm/radeon: fix ring free alignment calculations
fd.o bz#21849
We were aligning to +16 dwords, instead of to the next 16dword
boundary in the ring. Fix the calculation to go to the next 16dword
boundary when space checking.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_cp.c b/drivers/gpu/drm/radeon/radeon_cp.c
index 77a7a4d..aff90bb 100644
--- a/drivers/gpu/drm/radeon/radeon_cp.c
+++ b/drivers/gpu/drm/radeon/radeon_cp.c
@@ -2185,9 +2185,9 @@
/* check if the ring is padded out to 16-dword alignment */
- tail_aligned = dev_priv->ring.tail & 0xf;
+ tail_aligned = dev_priv->ring.tail & (RADEON_RING_ALIGN-1);
if (tail_aligned) {
- int num_p2 = 16 - tail_aligned;
+ int num_p2 = RADEON_RING_ALIGN - tail_aligned;
ring = dev_priv->ring.start;
/* pad with some CP_PACKET2 */