From: Clemens Ladisch <clemens@ladisch.de>
Date: Sun, 4 Sep 2011 20:13:09 +0000 (+0200)
Subject: ALSA: dice: fix hang when unplugging a running device
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4ed31f20bb5bb90f003c91734c6b9d18169ae27e;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

ALSA: dice: fix hang when unplugging a running device

When aborting a PCM stream, the xrun is signaled only if the stream is
running.  When disconnecting a PCM stream, calling snd_card_disconnect()
too early would change the stream into a non-running state and thus
prevent the xrun from being noticed by user space.

To prevent this, move the snd_card_disconnect() call after the xrun.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
---

diff --git a/sound/firewire/dice.c b/sound/firewire/dice.c
index 63446f86cdd7..d0575a96ea70 100644
--- a/sound/firewire/dice.c
+++ b/sound/firewire/dice.c
@@ -1000,12 +1000,15 @@ static void dice_remove(struct fw_unit *unit)
 {
 	struct dice *dice = dev_get_drvdata(&unit->device);
 
-	snd_card_disconnect(dice->card);
-
 	mutex_lock(&dice->mutex);
+
 	amdtp_out_stream_pcm_abort(&dice->stream);
+
+	snd_card_disconnect(dice->card);
+
 	dice_stream_stop(dice);
 	dice_owner_clear(dice);
+
 	mutex_unlock(&dice->mutex);
 
 	snd_card_free_when_closed(dice->card);