diff options
| author | Krzysztof Helt <krzysztof.h1@wp.pl> | 2009-03-16 21:32:25 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-03-17 09:27:47 +0100 |
| commit | dde332b660cf0bc2baaba678b52768a0fb6e6da2 (patch) | |
| tree | 0b58cbefed8b0f398c665906df26e6bc4740d4f4 /sound | |
| parent | 041b62374c7fedc11a8a1eeda2868612d3d1436c (diff) | |
| download | lwn-dde332b660cf0bc2baaba678b52768a0fb6e6da2.tar.gz lwn-dde332b660cf0bc2baaba678b52768a0fb6e6da2.zip | |
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')
| -rw-r--r-- | sound/isa/opl3sa2.c | 18 |
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); |