ALSA: opti93x: fix irq releasing if the irq cannot be allocated

Use the chip->irq to check if the irq should be released so the irq is not released
if it has not been allocated.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/isa/opti9xx/opti92x-ad1848.c b/sound/isa/opti9xx/opti92x-ad1848.c
index 8c88401c79bcde0d21a64b44c4c0d7ea3e420067..d8eac3f28947c68a8210aaa5d08c6a2a120a9eef 100644 (file)
--- a/sound/isa/opti9xx/opti92x-ad1848.c
+++ b/sound/isa/opti9xx/opti92x-ad1848.c
@@ -548,10 +548,13 @@ __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);
@@ -691,10 +694,9 @@ static void snd_card_opti9xx_free(struct snd_card *card)
 
        if (chip) {
 #ifdef OPTi93X
-               struct snd_wss *codec = chip->codec;
-               if (codec && codec->irq > 0) {
-                       disable_irq(codec->irq);
-                       free_irq(codec->irq, codec);
+               if (chip->irq > 0) {
+                       disable_irq(chip->irq);
+                       free_irq(chip->irq, chip);
                }
                release_and_free_resource(chip->res_mc_indir);
 #endif
@@ -759,9 +761,9 @@ static int __devinit snd_opti9xx_probe(struct snd_card *card)
 #endif
 #ifdef OPTi93X
        error = request_irq(irq, snd_opti93x_interrupt,
-                           IRQF_DISABLED, DEV_NAME" - WSS", codec);
+                           IRQF_DISABLED, DEV_NAME" - WSS", chip);
        if (error < 0) {
-               snd_printk(KERN_ERR "opti9xx: can't grab IRQ %d\n", chip->irq);
+               snd_printk(KERN_ERR "opti9xx: can't grab IRQ %d\n", irq);
                return error;
        }
 #endif