From: Zhang Qiang <qiang.zhang@xxxxxxxxxxxxx> Add a missing spinlock protection to the add operation of the "audio->play_queue" in "f_audio_out_ep_complete" function. Signed-off-by: Zhang Qiang <qiang.zhang@xxxxxxxxxxxxx> --- v1->v2: Add changelog text. drivers/usb/gadget/function/f_uac1_legacy.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/gadget/function/f_uac1_legacy.c b/drivers/usb/gadget/function/f_uac1_legacy.c index 349deae7cabd..e2d7f69128a0 100644 --- a/drivers/usb/gadget/function/f_uac1_legacy.c +++ b/drivers/usb/gadget/function/f_uac1_legacy.c @@ -336,7 +336,9 @@ static int f_audio_out_ep_complete(struct usb_ep *ep, struct usb_request *req) /* Copy buffer is full, add it to the play_queue */ if (audio_buf_size - copy_buf->actual < req->actual) { + spin_lock_irq(&audio->lock); list_add_tail(©_buf->list, &audio->play_queue); + spin_unlock_irq(&audio->lock); schedule_work(&audio->playback_work); copy_buf = f_audio_buffer_alloc(audio_buf_size); if (IS_ERR(copy_buf)) -- 2.24.1