diff options
| author | Krzysztof Helt <krzysztof.h1@wp.pl> | 2009-03-16 21:32:25 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-03-23 14:55:25 -0700 |
| commit | 0b94331d39f94e826c18a82a26415b5816af6d8f (patch) | |
| tree | 7635f33998381d7480a08bd57d194540e3e7c530 | |
| parent | b4f070f9fd05d02d8bf2ded9daae5f02b42f5f1e (diff) | |
| download | linux-stable-0b94331d39f94e826c18a82a26415b5816af6d8f.tar.gz | |
ALSA: opl3sa2 - Fix NULL dereference when suspending snd_opl3sa2
commit dde332b660cf0bc2baaba678b52768a0fb6e6da2 upstream.
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>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -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); |