Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().
Cc: Jaroslav Kysela <pe...@perex.cz>
Cc: Takashi Iwai <ti...@suse.de>
Cc: Clemens Ladisch <clem...@ladisch.de>
Cc: alsa-de...@alsa-project.org
Signed-off-by: Ming Lei <ming....@canonical.com>
---
sound/usb/midi.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index b901f46..86af276 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -279,15 +279,16 @@ static void snd_usbmidi_out_urb_complete(struct urb* urb)
struct out_urb_context *context = urb->context;
struct snd_usb_midi_out_endpoint* ep = context->ep;
unsigned int urb_index;
+ unsigned long flags;
- spin_lock(&ep->buffer_lock);
+ spin_lock_irqsave(&ep->buffer_lock, flags);
urb_index = context - ep->urbs;
ep->active_urbs &= ~(1 << urb_index);
if (unlikely(ep->drain_urbs)) {
ep->drain_urbs &= ~(1 << urb_index);
wake_up(&ep->drain_wait);
}
- spin_unlock(&ep->buffer_lock);
+ spin_unlock_irqrestore(&ep->buffer_lock, flags);
if (urb->status < 0) {
int err = snd_usbmidi_urb_error(urb->status);
if (err < 0) {
--
1.7.9.5
--
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