[media] media: i.MX27 camera: return IRQ_NONE if no IRQ status bit is set
If active_bufs() list is empty and no IRQ status bit is set we are probably dealing with a share IRQ. Return IRQ_NONE in this case. Signed-off-by: NJavier Martin <javier.martin@vista-silicon.com> Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
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