Complete() will be run with interrupt enabled, so change to spin_lock_irqsave().
Cc: Jaroslav Kysela <[email protected]> Cc: Takashi Iwai <[email protected]> Cc: Clemens Ladisch <[email protected]> Cc: [email protected] Signed-off-by: Ming Lei <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
