[media] pwc: poll(): Check that the device has not beem claimed for streaming already

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Some apps which use read() start the streaming through a call to poll(),
this means that if another app has already claimed the device for streaming
(through for example a s_fmt, or a reqbufs), that the poll should fail instead
of getting passed through to vb2_poll.

We only check for this when the app is polling for reads, so that ctrl events
still work.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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Hans de Goede 2011-10-09 10:28:27 -03:00 • committed by Mauro Carvalho Chehab

parent 0bf0f713d6

commit 296da3cd14

1 changed files with 9 additions and 0 deletions

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drivers/media/video/pwc/pwc-if.c

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