sh-mobile-ceu-camera: do not wait for interrupt when releasing buffers

From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>

Patch

[PATCH] video: use videobuf_waiton() in sh_mobile_ceu free_buffer()

was not quite correct. It closed a race, but introduced a potential
lock-up, if for some reason an interrupt does not come. This has been
observed in tests with tw9910. This patch safely dequeues buffers without
waiting for their completion. It also moves a buffer state assignment
under a spinlock to make it atomic with queuing of the buffer.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Priority: low
---
 drivers/media/video/sh_mobile_ceu_camera.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

0 files changed, 0 insertions, 0 deletions