diff options
Diffstat (limited to 'drivers/dma-buf/dma-fence-unwrap.c')
| -rw-r--r-- | drivers/dma-buf/dma-fence-unwrap.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/dma-buf/dma-fence-unwrap.c b/drivers/dma-buf/dma-fence-unwrap.c index 6345062731f1..2a059ac0ed27 100644 --- a/drivers/dma-buf/dma-fence-unwrap.c +++ b/drivers/dma-buf/dma-fence-unwrap.c @@ -84,8 +84,8 @@ struct dma_fence *__dma_fence_unwrap_merge(unsigned int num_fences, struct dma_fence **fences, struct dma_fence_unwrap *iter) { + struct dma_fence *tmp, *unsignaled = NULL, **array; struct dma_fence_array *result; - struct dma_fence *tmp, **array; ktime_t timestamp; int i, j, count; @@ -94,6 +94,8 @@ struct dma_fence *__dma_fence_unwrap_merge(unsigned int num_fences, for (i = 0; i < num_fences; ++i) { dma_fence_unwrap_for_each(tmp, &iter[i], fences[i]) { if (!dma_fence_is_signaled(tmp)) { + dma_fence_put(unsignaled); + unsignaled = dma_fence_get(tmp); ++count; } else { ktime_t t = dma_fence_timestamp(tmp); @@ -107,9 +109,16 @@ struct dma_fence *__dma_fence_unwrap_merge(unsigned int num_fences, /* * If we couldn't find a pending fence just return a private signaled * fence with the timestamp of the last signaled one. + * + * Or if there was a single unsignaled fence left we can return it + * directly and early since that is a major path on many workloads. */ if (count == 0) return dma_fence_allocate_private_stub(timestamp); + else if (count == 1) + return unsignaled; + + dma_fence_put(unsignaled); array = kmalloc_array(count, sizeof(*array), GFP_KERNEL); if (!array) |