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>

diff --git a/drivers/char/drm/via_dmablit.c b/drivers/char/drm/via_dmablit.c
index 832de1d..3dd1ed3 100644 (file)
--- 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;