@@ -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) {
Complete() will be run with interrupt enabled, so change to spin_lock_irqsave(). Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.de> Cc: Clemens Ladisch <clemens@ladisch.de> Cc: alsa-devel@alsa-project.org Signed-off-by: Ming Lei <ming.lei@canonical.com> --- sound/usb/midi.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)