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authorKrzysztof Helt <krzysztof.h1@wp.pl>2009-03-16 21:32:25 +0100
committerTakashi Iwai <tiwai@suse.de>2009-03-17 09:27:47 +0100
commitdde332b660cf0bc2baaba678b52768a0fb6e6da2 (patch)
tree0b58cbefed8b0f398c665906df26e6bc4740d4f4 /sound/isa/opl3sa2.c
parent041b62374c7fedc11a8a1eeda2868612d3d1436c (diff)
downloadlinux-dde332b660cf0bc2baaba678b52768a0fb6e6da2.tar.bz2
ALSA: opl3sa2 - Fix NULL dereference when suspending snd_opl3sa2
Fix the OOPS during a opl3sa2 card suspend and resume if the driver is loaded but the card is not found. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Cc: <stable@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/isa/opl3sa2.c')
-rw-r--r--sound/isa/opl3sa2.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/sound/isa/opl3sa2.c b/sound/isa/opl3sa2.c
index 58c972b2af03..b848d1001864 100644
--- a/sound/isa/opl3sa2.c
+++ b/sound/isa/opl3sa2.c
@@ -550,21 +550,27 @@ static int __devinit snd_opl3sa2_mixer(struct snd_card *card)
#ifdef CONFIG_PM
static int snd_opl3sa2_suspend(struct snd_card *card, pm_message_t state)
{
- struct snd_opl3sa2 *chip = card->private_data;
+ if (card) {
+ struct snd_opl3sa2 *chip = card->private_data;
- snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
- chip->wss->suspend(chip->wss);
- /* power down */
- snd_opl3sa2_write(chip, OPL3SA2_PM_CTRL, OPL3SA2_PM_D3);
+ snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+ chip->wss->suspend(chip->wss);
+ /* power down */
+ snd_opl3sa2_write(chip, OPL3SA2_PM_CTRL, OPL3SA2_PM_D3);
+ }
return 0;
}
static int snd_opl3sa2_resume(struct snd_card *card)
{
- struct snd_opl3sa2 *chip = card->private_data;
+ struct snd_opl3sa2 *chip;
int i;
+ if (!card)
+ return 0;
+
+ chip = card->private_data;
/* power up */
snd_opl3sa2_write(chip, OPL3SA2_PM_CTRL, OPL3SA2_PM_D0);