[media] s5p-mfc: Remove deprecated create_singlethread_workqueue
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@gmail.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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