[PATCH] dvb: siano: free spinlock before schedule()

[Kulikov Vasiliy]

Calling schedule() holding spinlock with disables irqs is improper. As
spinlock protects list coredev->buffers, it can be unlocked untill wakeup.
This bug was introduced in a9349315f65cd6a16e8fab1f6cf0fd40f379c4db.

Signed-off-by: Kulikov Vasiliy <segooon@xxxxxxxxx>
---
 drivers/media/dvb/siano/smscoreapi.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/media/dvb/siano/smscoreapi.c b/drivers/media/dvb/siano/smscoreapi.c
index 7f2c94a..d93468c 100644
--- a/drivers/media/dvb/siano/smscoreapi.c
+++ b/drivers/media/dvb/siano/smscoreapi.c
@@ -1113,9 +1113,11 @@ struct smscore_buffer_t *smscore_getbuffer(struct smscore_device_t *coredev)
 	 */
 
 	prepare_to_wait(&coredev->buffer_mng_waitq, &wait, TASK_INTERRUPTIBLE);
-
-	if (list_empty(&coredev->buffers))
+	if (list_empty(&coredev->buffers)) {
+		spin_unlock_irqrestore(&coredev->bufferslock, flags);
 		schedule();
+		spin_lock_irqsave(&coredev->bufferslock, flags);
+	}
 
 	finish_wait(&coredev->buffer_mng_waitq, &wait);
 
-- 
1.7.0.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/