[media] mem2mem: make queue lock in v4l2_m2m_poll interruptible
This patch makes the queue lock taken in v4l2_m2m_poll interruptible.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 178ce96..97defed 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -568,8 +568,12 @@
if (m2m_ctx->m2m_dev->m2m_ops->lock)
m2m_ctx->m2m_dev->m2m_ops->lock(m2m_ctx->priv);
- else if (m2m_ctx->q_lock)
- mutex_lock(m2m_ctx->q_lock);
+ else if (m2m_ctx->q_lock) {
+ if (mutex_lock_interruptible(m2m_ctx->q_lock)) {
+ rc |= POLLERR;
+ goto end;
+ }
+ }
spin_lock_irqsave(&src_q->done_lock, flags);
if (!list_empty(&src_q->done_list))