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
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