From: Jérôme Pouiller <jerome.pouiller@xxxxxxxxxx> wfx_tx_flush() wait there are no more frame in device buffer. However, this event may never happens since wfx_tx_flush() don't forbid to enqueue new frames. Note that wfx_tx_flush() should only ensure that all frames currently in hardware queues are sent. So the current code is more restrictive that it should. Note that wfx_tx_flush() release the lock before to return while wfx_tx_lock_flush() keep the lock. Signed-off-by: Jérôme Pouiller <jerome.pouiller@xxxxxxxxxx> --- drivers/staging/wfx/queue.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/staging/wfx/queue.c b/drivers/staging/wfx/queue.c index d4302a30dc41..e6d7d0e45156 100644 --- a/drivers/staging/wfx/queue.c +++ b/drivers/staging/wfx/queue.c @@ -36,6 +36,7 @@ void wfx_tx_flush(struct wfx_dev *wdev) if (wdev->chip_frozen) return; + wfx_tx_lock(wdev); mutex_lock(&wdev->hif_cmd.lock); ret = wait_event_timeout(wdev->hif.tx_buffers_empty, !wdev->hif.tx_buffers_used, @@ -54,6 +55,7 @@ void wfx_tx_flush(struct wfx_dev *wdev) wdev->chip_frozen = 1; } mutex_unlock(&wdev->hif_cmd.lock); + wfx_tx_unlock(wdev); } void wfx_tx_lock_flush(struct wfx_dev *wdev) -- 2.25.1
