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[ALSA] ASoC at91 - Fix NULL pointer dereference in at91_i2s_shutdown 

This patch fixes a NULL pointer exception which occurs when a
substream is opened and immediately closed.

Signed-off-by: Frank Mandarino <fmandarino@endrelia.com>
Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Frank Mandarino 2007-01-08 10:58:47 +01:00 committed by Jaroslav Kysela
parent ad5e773750
commit ffc26918ab
1 changed files with 7 additions and 0 deletions
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7
sound/soc/at91/at91-i2s.c
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@ -296,6 +296,13 @@ static int at91_i2s_startup(struct snd_pcm_substream *substream)
ssc_p->dir_mask |= dir_mask;
spin_unlock_irq(&ssc_p->lock);
/*
* dma_data is not set until hw_params() is called and
* shutdown() depends on this value being NULL if hw_params()
* was not called.
*/
rtd->cpu_dai->dma_data = NULL;
return 0;
}