netdev - [PATCH 46/50] Sound: usb: ua101: spin

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Date:	Thu, 11 Jul 2013 17:06:09 +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>,
	Clemens Ladisch <clemens@...isch.de>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 46/50] Sound: usb: ua101: spin_lock in complete() cleanup

Complete() will be run with interrupt enabled, so disable local
interrupt before holding a global lock which is held without irqsave.

Cc: Clemens Ladisch <clemens@...isch.de>
Cc: Jaroslav Kysela <perex@...ex.cz>
Cc: Takashi Iwai <tiwai@...e.de>
Cc: alsa-devel@...a-project.org
Signed-off-by: Ming Lei <ming.lei@...onical.com>
---
 sound/usb/misc/ua101.c |   14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/sound/usb/misc/ua101.c b/sound/usb/misc/ua101.c
index 8b5d2c5..52a60c6 100644
--- a/sound/usb/misc/ua101.c
+++ b/sound/usb/misc/ua101.c
@@ -613,14 +613,24 @@ static int start_usb_playback(struct ua101 *ua)
 
 static void abort_alsa_capture(struct ua101 *ua)
 {
-	if (test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
+	if (test_bit(ALSA_CAPTURE_RUNNING, &ua->states)) {
+		unsigned long flags;
+
+		local_irq_save(flags);
 		snd_pcm_stop(ua->capture.substream, SNDRV_PCM_STATE_XRUN);
+		local_irq_restore(flags);
+	}
 }
 
 static void abort_alsa_playback(struct ua101 *ua)
 {
-	if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states))
+	if (test_bit(ALSA_PLAYBACK_RUNNING, &ua->states)) {
+		unsigned long flags;
+
+		local_irq_save(flags);
 		snd_pcm_stop(ua->playback.substream, SNDRV_PCM_STATE_XRUN);
+		local_irq_restore(flags);
+	}
 }
 
 static int set_stream_hw(struct ua101 *ua, struct snd_pcm_substream *substream,
-- 
1.7.9.5

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