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path: root/drivers/dma-buf
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Diffstat (limited to 'drivers/dma-buf')
-rw-r--r--drivers/dma-buf/dma-fence.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
index 4edb9fd3cf47..dd01a1720be9 100644
--- a/drivers/dma-buf/dma-fence.c
+++ b/drivers/dma-buf/dma-fence.c
@@ -200,7 +200,8 @@ void dma_fence_enable_sw_signaling(struct dma_fence *fence)
if (!test_and_set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT,
&fence->flags) &&
- !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags)) {
+ !test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags) &&
+ fence->ops->enable_signaling) {
trace_dma_fence_enable_signal(fence);
spin_lock_irqsave(fence->lock, flags);
@@ -260,7 +261,7 @@ int dma_fence_add_callback(struct dma_fence *fence, struct dma_fence_cb *cb,
if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
ret = -ENOENT;
- else if (!was_set) {
+ else if (!was_set && fence->ops->enable_signaling) {
trace_dma_fence_enable_signal(fence);
if (!fence->ops->enable_signaling(fence)) {
@@ -388,7 +389,7 @@ dma_fence_default_wait(struct dma_fence *fence, bool intr, signed long timeout)
if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
goto out;
- if (!was_set) {
+ if (!was_set && fence->ops->enable_signaling) {
trace_dma_fence_enable_signal(fence);
if (!fence->ops->enable_signaling(fence)) {
@@ -560,7 +561,7 @@ dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops,
spinlock_t *lock, u64 context, unsigned seqno)
{
BUG_ON(!lock);
- BUG_ON(!ops || !ops->wait || !ops->enable_signaling ||
+ BUG_ON(!ops || !ops->wait ||
!ops->get_driver_name || !ops->get_timeline_name);
kref_init(&fence->refcount);