[PATCH] [media] s5p-mfc: Remove deprecated create_singlethread_workqueue

From: Bhaktipriya Shridhar
Date: Sat Jul 16 2016 - 04:30:53 EST

alloc_workqueue replaces deprecated create_singlethread_workqueue().

The MFC device driver is a v4l2 driver which can encode/decode video
raw/elementary streams and has support for all popular video codecs.

The driver's watchdog_workqueue has been replaced with system_wq since
it queues a single work item, &dev->watchdog_work, which calls for no
ordering requirement. The work item is involved in running the watchdog
timer and is not being used on a memory reclaim path.

Work item has been flushed in s5p_mfc_remove() to ensure
that there are no pending tasks while disconnecting the driver.

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@xxxxxxxxx>
drivers/media/platform/s5p-mfc/s5p_mfc.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index b16466f..1bc27ec 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -152,7 +152,7 @@ static void s5p_mfc_watchdog(unsigned long arg)
* error. Now it is time to kill all instances and
* reset the MFC. */
mfc_err("Time out during waiting for HW\n");
- queue_work(dev->watchdog_workqueue, &dev->watchdog_work);
+ schedule_work(&dev->watchdog_work);
dev->watchdog_timer.expires = jiffies +
@@ -1238,7 +1238,6 @@ static int s5p_mfc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, dev);

dev->hw_lock = 0;
- dev->watchdog_workqueue = create_singlethread_workqueue(S5P_MFC_NAME);
INIT_WORK(&dev->watchdog_work, s5p_mfc_watchdog_worker);
atomic_set(&dev->watchdog_cnt, 0);
@@ -1284,8 +1283,7 @@ static int s5p_mfc_remove(struct platform_device *pdev)
v4l2_info(&dev->v4l2_dev, "Removing %s\n", pdev->name);

- flush_workqueue(dev->watchdog_workqueue);
- destroy_workqueue(dev->watchdog_workqueue);
+ flush_work(&dev->watchdog_work);