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[43/50] sound: usb: midi: spin_lock in complete() cleanup

Message ID 1373533573-12272-44-git-send-email-ming.lei@canonical.com
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Ming Lei July 11, 2013, 9:06 a.m. UTC 
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(-)
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Patch

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) {