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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@mcmen.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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