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The workqueue "_irq_audio_queues" runs the audio upstream handler. It has a single work item(&dev->_audio_work_entry) and hence doesn't require ordering. Also, it is not being used on a memory reclaim path. Hence, the singlethreaded workqueue has been replaced with the use of system_wq. System workqueues have been able to handle high level of concurrency for a long time now and hence it's not required to have a singlethreaded workqueue just to gain concurrency. Unlike a dedicated per-cpu workqueue created with create_singlethread_workqueue(), system_wq allows multiple work items to overlap executions even on the same CPU; however, a per-cpu workqueue doesn't have any CPU locality or global ordering guarantee unless the target CPU is explicitly specified and thus the increase of local concurrency shouldn't make any difference. The work item has been flushed in cx25821_stop_upstream_audio() to ensure that nothing is pending when the driver is disconnected. Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> |
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| .. | ||
| cx25821-alsa.c | ||
| cx25821-audio-upstream.c | ||
| cx25821-audio-upstream.h | ||
| cx25821-audio.h | ||
| cx25821-biffuncs.h | ||
| cx25821-cards.c | ||
| cx25821-core.c | ||
| cx25821-gpio.c | ||
| cx25821-i2c.c | ||
| cx25821-medusa-defines.h | ||
| cx25821-medusa-reg.h | ||
| cx25821-medusa-video.c | ||
| cx25821-medusa-video.h | ||
| cx25821-reg.h | ||
| cx25821-sram.h | ||
| cx25821-video-upstream.c | ||
| cx25821-video-upstream.h | ||
| cx25821-video.c | ||
| cx25821-video.h | ||
| cx25821.h | ||
| Kconfig | ||
| Makefile | ||