[media] em28xx: properly handle subdev controls

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Subdev controls return codes are evil, as they return -EINVAL to mean
both unsupported and invalid arguments. Due to that, we need to use a
trick to identify what controls are supported by a subdev.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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Mauro Carvalho Chehab 2011-02-22 01:00:58 -03:00

parent 78e51566f0

commit fb8decfabd

1 changed files with 28 additions and 3 deletions

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31

drivers/media/video/em28xx/em28xx-video.c

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