From: Krzysztof Helt krzysztof.h1@wp.pl
Move irq allocating earlier so the codec pointer and codec->irq are not set if the request_irq() fails.
Signed-off-by: Krzysztof Helt krzysztof.h1@wp.pl --- The third version. The irq is correctly freed if the snd_wss_create() fails (this is the only change since the previous version).
sound/isa/opti9xx/opti92x-ad1848.c | 31 +++++++++++++++++++------------ 1 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/sound/isa/opti9xx/opti92x-ad1848.c b/sound/isa/opti9xx/opti92x-ad1848.c index 5cd5553..7c97ca8 100644 --- a/sound/isa/opti9xx/opti92x-ad1848.c +++ b/sound/isa/opti9xx/opti92x-ad1848.c @@ -558,10 +558,13 @@ __skip_mpu:
static irqreturn_t snd_opti93x_interrupt(int irq, void *dev_id) { - struct snd_wss *codec = dev_id; - struct snd_opti9xx *chip = codec->card->private_data; + struct snd_opti9xx *chip = dev_id; + struct snd_wss *codec = chip->codec; unsigned char status;
+ if (!codec) + return IRQ_HANDLED; + status = snd_opti9xx_read(chip, OPTi9XX_MC_REG(11)); if ((status & OPTi93X_IRQ_PLAYBACK) && codec->playback_substream) snd_pcm_period_elapsed(codec->playback_substream); @@ -690,7 +693,7 @@ static void snd_card_opti9xx_free(struct snd_card *card) struct snd_wss *codec = chip->codec; if (codec && codec->irq > 0) { disable_irq(codec->irq); - free_irq(codec->irq, codec); + free_irq(codec->irq, chip); } #endif release_and_free_resource(chip->res_mc_base); @@ -738,6 +741,14 @@ static int __devinit snd_opti9xx_probe(struct snd_card *card) if (error) return error;
+#ifdef OPTi93X + error = request_irq(chip->irq, snd_opti93x_interrupt, + IRQF_DISABLED, DEV_NAME" - WSS", chip); + if (error < 0) { + snd_printk(KERN_ERR "opti9xx: can't grab IRQ %d\n", chip->irq); + return error; + } +#endif error = snd_wss_create(card, chip->wss_base + 4, -1, chip->irq, chip->dma1, chip->dma2, #ifdef OPTi93X @@ -746,8 +757,12 @@ static int __devinit snd_opti9xx_probe(struct snd_card *card) WSS_HW_DETECT, 0, #endif &codec); - if (error < 0) + if (error < 0) { +#ifdef OPTi93X + free_irq(chip->irq, chip); +#endif return error; + } #ifdef OPTi93X chip->codec = codec; #endif @@ -762,14 +777,6 @@ static int __devinit snd_opti9xx_probe(struct snd_card *card) if (error < 0) return error; #endif -#ifdef OPTi93X - error = request_irq(chip->irq, snd_opti93x_interrupt, - IRQF_DISABLED, DEV_NAME" - WSS", codec); - if (error < 0) { - snd_printk(KERN_ERR "opti9xx: can't grab IRQ %d\n", chip->irq); - return error; - } -#endif strcpy(card->driver, chip->name); sprintf(card->shortname, "OPTi %s", card->driver); #if defined(CS4231) || defined(OPTi93X)