linux-kernel - [PATCH] Improve behaviour of Dreamcast aica ALSA driver in poor resource conditions

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Date:	Tue, 3 Jul 2007 22:36:40 +0100
From:	"Adrian McMenamin" <adrianmcmenamin@...il.com>
To:	alsa-devel@...a-project.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] Improve behaviour of Dreamcast aica ALSA driver in poor resource conditions

This patch stops the driver from crashing in certain situations (eg if
the network fails when NFS mounted), please apply.

Signed-off by: Adrian McMenamin <adrian@...en.demon.co.uk>

--- alsa-kernel/sh/aica.c	2007-06-23 15:25:55.000000000 +0100
+++ linux-2.6.21/sound/sh/aica.c	2007-07-03 22:28:16.000000000 +0100
@@ -366,7 +366,9 @@
 				 *substream)
 {
 	struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
+	flush_workqueue(aica_queue);
 	del_timer(&dreamcastcard->timer);
+	aica_chn_halt();
 	kfree(dreamcastcard->channel);
 	spu_disable();
 	return 0;
@@ -402,16 +404,11 @@
 static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
 				   *substream, int cmd)
 {
-	struct snd_card_aica *dreamcastcard;
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 		spu_begin_dma(substream);
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
-		dreamcastcard = substream->pcm->private_data;
-		if (dreamcastcard->timer.data)
-			del_timer(&dreamcastcard->timer);
-		aica_chn_halt();
 		break;
 	default:
 		return -EINVAL;
-
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