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-rw-r--r--sound/usb/endpoint.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 1f757a7eeafe..c32022672319 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -927,6 +927,7 @@ void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep)
static int stop_urbs(struct snd_usb_endpoint *ep, bool force)
{
unsigned int i;
+ unsigned long flags;
if (!force && atomic_read(&ep->running))
return -EBUSY;
@@ -934,9 +935,11 @@ static int stop_urbs(struct snd_usb_endpoint *ep, bool force)
if (!ep_state_update(ep, EP_STATE_RUNNING, EP_STATE_STOPPING))
return 0;
+ spin_lock_irqsave(&ep->lock, flags);
INIT_LIST_HEAD(&ep->ready_playback_urbs);
ep->next_packet_head = 0;
ep->next_packet_queued = 0;
+ spin_unlock_irqrestore(&ep->lock, flags);
for (i = 0; i < ep->nurbs; i++) {
if (test_bit(i, &ep->active_mask)) {