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[ALSA] ac97 - Fix potential negative array index 

Fix the case cidx2 >= 0 and cidx2 < 0 which may result in negative
array index.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai 2006-11-08 15:48:43 +01:00 committed by Jaroslav Kysela
parent b90d7760ea
commit c19bcdc64a
1 changed files with 3 additions and 1 deletions
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4
sound/pci/ac97/ac97_patch.c
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@ -1467,7 +1467,9 @@ static void patch_ad1881_chained(struct snd_ac97 * ac97, int unchained_idx, int
snd_ac97_write_cache(ac97, AC97_AD_CODEC_CFG, 0x0002); // ID1C
ac97->spec.ad18xx.codec_cfg[unchained_idx] = 0x0002;
if (cidx1 >= 0) {
if (patch_ad1881_chained1(ac97, cidx1, 0x0006)) // SDIE | ID1C
if (cidx2 < 0)
patch_ad1881_chained1(ac97, cidx1, 0);
else if (patch_ad1881_chained1(ac97, cidx1, 0x0006)) // SDIE | ID1C
patch_ad1881_chained1(ac97, cidx2, 0);
else if (patch_ad1881_chained1(ac97, cidx2, 0x0006)) // SDIE | ID1C
patch_ad1881_chained1(ac97, cidx1, 0);