[PATCH] ALSA: sgio2audio: Only free successfully requested IRQs

[Runyu Xiao]

snd_sgio2audio_create() calls snd_sgio2audio_free() when an IRQ
request fails. The cleanup helper currently walks the complete IRQ table,
including entries whose request_irq() calls have not been attempted yet.
free_irq() then receives an IRQ and dev_id pair that was never registered.

Pass the number of successfully requested IRQs to the cleanup helper on
the request failure path, while retaining the full-table cleanup for
teardown after all requests have succeeded.

Fixes: 862c2c0a61c5 ("ALSA: ALSA driver for SGI O2 audio board")
Cc: stable@xxxxxxxxxxxxxxx
Assisted-by: LLM
Signed-off-by: Runyu Xiao <runyu.xiao@xxxxxxxxxx>
---
 sound/mips/sgio2audio.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/sound/mips/sgio2audio.c b/sound/mips/sgio2audio.c
index 497d84cff..35648b0b9 100644
--- a/sound/mips/sgio2audio.c
+++ b/sound/mips/sgio2audio.c
@@ -742,7 +742,8 @@ static struct {
 
 /* ALSA driver */
 
-static int snd_sgio2audio_free(struct snd_sgio2audio *chip)
+static int snd_sgio2audio_free(struct snd_sgio2audio *chip,
+			       unsigned int irq_count)
 {
 	int i;
 
@@ -752,7 +753,7 @@ static int snd_sgio2audio_free(struct snd_sgio2audio *chip)
 	writeq(0, &mace->perif.audio.control);
 
 	/* release IRQ's */
-	for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++)
+	for (i = 0; i < irq_count; i++)
 		free_irq(snd_sgio2_isr_table[i].irq,
 			 &chip->channel[snd_sgio2_isr_table[i].idx]);
 
@@ -768,7 +769,7 @@ static int snd_sgio2audio_dev_free(struct snd_device *device)
 {
 	struct snd_sgio2audio *chip = device->device_data;
 
-	return snd_sgio2audio_free(chip);
+	return snd_sgio2audio_free(chip, ARRAY_SIZE(snd_sgio2_isr_table));
 }
 
 static const struct snd_device_ops ops = {
@@ -819,7 +820,7 @@ static int snd_sgio2audio_create(struct snd_card *card,
 				0,
 				snd_sgio2_isr_table[i].desc,
 				&chip->channel[snd_sgio2_isr_table[i].idx])) {
-			snd_sgio2audio_free(chip);
+			snd_sgio2audio_free(chip, i);
 			printk(KERN_ERR "sgio2audio: cannot allocate irq %d\n",
 			       snd_sgio2_isr_table[i].irq);
 			return -EBUSY;
@@ -843,13 +844,13 @@ static int snd_sgio2audio_create(struct snd_card *card,
 	/* initialize the AD1843 codec */
 	err = ad1843_init(&chip->ad1843);
 	if (err < 0) {
-		snd_sgio2audio_free(chip);
+		snd_sgio2audio_free(chip, ARRAY_SIZE(snd_sgio2_isr_table));
 		return err;
 	}
 
 	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 	if (err < 0) {
-		snd_sgio2audio_free(chip);
+		snd_sgio2audio_free(chip, ARRAY_SIZE(snd_sgio2_isr_table));
 		return err;
 	}
 	*rchip = chip;
-- 
2.34.1