diff options
Diffstat (limited to 'drivers/gpu/drm/qxl/qxl_cmd.c')
| -rw-r--r-- | drivers/gpu/drm/qxl/qxl_cmd.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_cmd.c b/drivers/gpu/drm/qxl/qxl_cmd.c index 208af9f37914..25ec8e6544ee 100644 --- a/drivers/gpu/drm/qxl/qxl_cmd.c +++ b/drivers/gpu/drm/qxl/qxl_cmd.c @@ -84,6 +84,7 @@ static int qxl_check_header(struct qxl_ring *ring) int ret; struct qxl_ring_header *header = &(ring->ring->header); unsigned long flags; + spin_lock_irqsave(&ring->lock, flags); ret = header->prod - header->cons < header->num_items; if (ret == 0) @@ -97,6 +98,7 @@ int qxl_check_idle(struct qxl_ring *ring) int ret; struct qxl_ring_header *header = &(ring->ring->header); unsigned long flags; + spin_lock_irqsave(&ring->lock, flags); ret = header->prod == header->cons; spin_unlock_irqrestore(&ring->lock, flags); @@ -110,6 +112,7 @@ int qxl_ring_push(struct qxl_ring *ring, uint8_t *elt; int idx, ret; unsigned long flags; + spin_lock_irqsave(&ring->lock, flags); if (header->prod - header->cons == header->num_items) { header->notify_on_cons = header->cons + 1; @@ -156,6 +159,7 @@ static bool qxl_ring_pop(struct qxl_ring *ring, volatile uint8_t *ring_elt; int idx; unsigned long flags; + spin_lock_irqsave(&ring->lock, flags); if (header->cons == header->prod) { header->notify_on_prod = header->cons + 1; |