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[ALSA] AMD Au1x00: fix DMA init/cleanup 

Modules: MIPS AU1x00 driver

AMD Au1x00 ALSA driver causes kernel oops in au1000_init() by trying
to set DMA channel to -1 in yet unallocated audio streams. Here's the
patch that staightens up DMA init/cleanup code.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Sergei Shtylyov 2006-03-21 11:58:48 +01:00 committed by Jaroslav Kysela
parent 97ec558a88
commit bb160b850d
1 changed files with 20 additions and 13 deletions
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33
sound/mips/au1x00.c
View File

@ -612,14 +612,17 @@ snd_au1000_free(struct snd_card *card)
release_and_free_resource(au1000->ac97_res_port);
}
if (au1000->stream[PLAYBACK]->dma >= 0)
free_au1000_dma(au1000->stream[PLAYBACK]->dma);
if (au1000->stream[PLAYBACK]) {
if (au1000->stream[PLAYBACK]->dma >= 0)
free_au1000_dma(au1000->stream[PLAYBACK]->dma);
kfree(au1000->stream[PLAYBACK]);
}
if (au1000->stream[CAPTURE]->dma >= 0)
free_au1000_dma(au1000->stream[CAPTURE]->dma);
kfree(au1000->stream[PLAYBACK]);
kfree(au1000->stream[CAPTURE]);
if (au1000->stream[CAPTURE]) {
if (au1000->stream[CAPTURE]->dma >= 0)
free_au1000_dma(au1000->stream[CAPTURE]->dma);
kfree(au1000->stream[CAPTURE]);
}
}
@ -638,15 +641,19 @@ au1000_init(void)
card->private_free = snd_au1000_free;
au1000 = card->private_data;
/* so that snd_au1000_free will work as intended */
au1000->card = card;
au1000->stream[PLAYBACK]->dma = -1;
au1000->stream[CAPTURE]->dma = -1;
au1000->ac97_res_port = NULL;
au1000->stream[PLAYBACK] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL);
au1000->stream[CAPTURE] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL);
au1000->stream[CAPTURE ] = kmalloc(sizeof(struct audio_stream), GFP_KERNEL);
/* so that snd_au1000_free will work as intended */
au1000->ac97_res_port = NULL;
if (au1000->stream[PLAYBACK])
au1000->stream[PLAYBACK]->dma = -1;
if (au1000->stream[CAPTURE ])
au1000->stream[CAPTURE ]->dma = -1;
if (au1000->stream[PLAYBACK] == NULL ||
au1000->stream[CAPTURE] == NULL) {
au1000->stream[CAPTURE ] == NULL) {
snd_card_free(card);
return -ENOMEM;
}