drm/via: Fix dmablit when blit queue is full

fd.o bug 11542

Acked-by: Thomas Hellstrom
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/char/drm/via_dmablit.c b/drivers/char/drm/via_dmablit.c
index 832de1d9ba7e..3dd1ed3d1bf5 100644
--- a/drivers/char/drm/via_dmablit.c
+++ b/drivers/char/drm/via_dmablit.c
@@ -560,7 +560,7 @@ via_init_dmablit(struct drm_device *dev)
                 blitq->head = 0;
                 blitq->cur = 0;
                 blitq->serviced = 0;
-                blitq->num_free = VIA_NUM_BLIT_SLOTS;
+                blitq->num_free = VIA_NUM_BLIT_SLOTS - 1;
                 blitq->num_outstanding = 0;
                 blitq->is_active = 0;
                 blitq->aborting = 0;