[media] vpif_capture: protect dma_queue by a spin_lock
The dma_queue list is accessed by both the interrupt handler and by normal code. It needs to be protected by a lock to prevent possible list corruption. Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com> Acked-by: NLad, Prabhakar <prabhakar.lad@ti.com> Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
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