[PATCH v2] Revert "dma-buf/sync-file: Avoid enable fence signaling if poll(.timeout=0)"

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.padovan at collabora.co.uk>

This reverts commit ecebca79f6976ddaddfd054d699272515869ea28.

Do not enable fence callback on poll() when using fence_array causes the
fence_array to not signal.

For now we will revert the change and enable signaling everytime time
poll is called with timeout=0 as well.

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
---
 drivers/dma-buf/sync_file.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
index 69d8ef9..6d802f2 100644
--- a/drivers/dma-buf/sync_file.c
+++ b/drivers/dma-buf/sync_file.c
@@ -308,8 +308,7 @@ static unsigned int sync_file_poll(struct file *file, poll_table *wait)
 
 	poll_wait(file, &sync_file->wq, wait);
 
-	if (!poll_does_not_wait(wait) &&
-	    !test_and_set_bit(POLL_ENABLED, &sync_file->fence->flags)) {
+	if (!test_and_set_bit(POLL_ENABLED, &sync_file->fence->flags)) {
 		if (dma_fence_add_callback(sync_file->fence, &sync_file->cb,
 					   fence_check_cb_func) < 0)
 			wake_up_all(&sync_file->wq);
-- 
2.5.5