From a85fd20fb62e5720ea4831b132334abc618972dd Mon Sep 17 00:00:00 2001 From: Philipp Zabel Date: Mon, 26 May 2014 10:49:22 -0300 Subject: [PATCH] [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 Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/v4l2-core/v4l2-mem2mem.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c index 178ce96556c6..97defed7c1ac 100644 --- a/drivers/media/v4l2-core/v4l2-mem2mem.c +++ b/drivers/media/v4l2-core/v4l2-mem2mem.c @@ -568,8 +568,12 @@ unsigned int v4l2_m2m_poll(struct file *file, struct v4l2_m2m_ctx *m2m_ctx, 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)) -- 2.20.1