diff options
| -rw-r--r-- | drivers/dma-buf/sync_file.c | 21 | ||||
| -rw-r--r-- | include/linux/sync_file.h | 2 |
2 files changed, 10 insertions, 13 deletions
diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c index 2873760..486d29c 100644 --- a/drivers/dma-buf/sync_file.c +++ b/drivers/dma-buf/sync_file.c @@ -86,8 +86,6 @@ struct sync_file *sync_file_create(struct fence *fence) fence->ops->get_timeline_name(fence), fence->context, fence->seqno); - fence_add_callback(fence, &sync_file->cb, fence_check_cb_func); - return sync_file; } EXPORT_SYMBOL(sync_file_create); @@ -274,9 +272,6 @@ static struct sync_file *sync_file_merge(const char *name, struct sync_file *a, goto err; } - fence_add_callback(sync_file->fence, &sync_file->cb, - fence_check_cb_func); - strlcpy(sync_file->name, name, sizeof(sync_file->name)); return sync_file; @@ -291,7 +286,8 @@ static void sync_file_free(struct kref *kref) struct sync_file *sync_file = container_of(kref, struct sync_file, kref); - fence_remove_callback(sync_file->fence, &sync_file->cb); + if (test_bit(POLL_ENABLED, &sync_file->fence->flags)) + fence_remove_callback(sync_file->fence, &sync_file->cb); fence_put(sync_file->fence); kfree(sync_file); } @@ -307,17 +303,16 @@ static int sync_file_release(struct inode *inode, struct file *file) static unsigned int sync_file_poll(struct file *file, poll_table *wait) { struct sync_file *sync_file = file->private_data; - int status; poll_wait(file, &sync_file->wq, wait); - status = fence_is_signaled(sync_file->fence); + if (!test_and_set_bit(POLL_ENABLED, &sync_file->fence->flags)) { + if (fence_add_callback(sync_file->fence, &sync_file->cb, + fence_check_cb_func) < 0) + wake_up_all(&sync_file->wq); + } - if (status) - return POLLIN; - if (status < 0) - return POLLERR; - return 0; + return fence_is_signaled(sync_file->fence) ? POLLIN : 0; } static long sync_file_ioctl_merge(struct sync_file *sync_file, diff --git a/include/linux/sync_file.h b/include/linux/sync_file.h index f7de5a0..aa17ccf 100644 --- a/include/linux/sync_file.h +++ b/include/linux/sync_file.h @@ -45,6 +45,8 @@ struct sync_file { struct fence_cb cb; }; +#define POLL_ENABLED FENCE_FLAG_USER_BITS + struct sync_file *sync_file_create(struct fence *fence); struct fence *sync_file_get_fence(int fd); |
