[media] s5p-mfc: use spinlock to protect MFC context
MFC driver uses dev->irqlock spinlock to protect queues only, but many context fields require protection also - they can be accessed concurrently from IOCTLs and IRQ handler. The patch increases protection range of irqlock to those fields also. Signed-off-by: NAndrzej Hajda <a.hajda@samsung.com> Signed-off-by: NKamil Debski <k.debski@samsung.com> Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
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