staging: bcm2835-camera: Do not bulk receive from service thread

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vchi_bulk_queue_receive will queue up to a default of 4
bulk receives on a connection before blocking.
If called from the VCHI service_callback thread, then
that thread is unable to service the VCHI_CALLBACK_BULK_RECEIVED
events that would enable the queue call to succeed.

Add a workqueue to schedule the call vchi_bulk_queue_receive
in an alternate context to avoid the lock up.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Dave Stevenson 2019-06-29 14:13:18 +02:00 • committed by Greg Kroah-Hartman

parent 8dedab2903

commit a1120db357

1 changed files with 59 additions and 42 deletions

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101

drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c

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