netdev - [PATCH 43/50] sound: usb: midi: spin

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Message-Id: <1373533573-12272-44-git-send-email-ming.lei@canonical.com>
Date:	Thu, 11 Jul 2013 17:06:06 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-usb@...r.kernel.org, Oliver Neukum <oliver@...kum.org>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-input@...r.kernel.org, linux-bluetooth@...r.kernel.org,
	netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
	linux-media@...r.kernel.org, alsa-devel@...a-project.org,
	Ming Lei <ming.lei@...onical.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Clemens Ladisch <clemens@...isch.de>
Subject: [PATCH 43/50] sound: usb: midi: spin_lock in complete() cleanup

Complete() will be run with interrupt enabled, so change to
spin_lock_irqsave().

Cc: Jaroslav Kysela <perex@...ex.cz>
Cc: Takashi Iwai <tiwai@...e.de>
Cc: Clemens Ladisch <clemens@...isch.de>
Cc: alsa-devel@...a-project.org
Signed-off-by: Ming Lei <ming.lei@...onical.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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