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[media] v4l2-mem2mem: fix context removal from job queue in v4l2_m2m_streamoff

Message ID 1379576432-26984-1-git-send-email-p.zabel@pengutronix.de (mailing list archive)
State New, archived
Headers show

Commit Message

Philipp Zabel Sept. 19, 2013, 7:40 a.m. UTC
Just clearing the m2m_ctx->queue list_head will leave the m2m_dev->job_queue
in a broken state and can cause scheduling of device_runs after streamoff was
called.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 drivers/media/v4l2-core/v4l2-mem2mem.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 7c43712..8f116c2 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -480,7 +480,8 @@  int v4l2_m2m_streamoff(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
 	m2m_dev = m2m_ctx->m2m_dev;
 	spin_lock_irqsave(&m2m_dev->job_spinlock, flags_job);
 	/* We should not be scheduled anymore, since we're dropping a queue. */
-	INIT_LIST_HEAD(&m2m_ctx->queue);
+	if (m2m_ctx->job_flags & TRANS_QUEUED)
+		list_del(&m2m_ctx->queue);
 	m2m_ctx->job_flags = 0;
 
 	spin_lock_irqsave(&q_ctx->rdy_spinlock, flags);