[PATCH v2] ALSA: ice1712: Fix the card leak at probe error with the auto-cleanup

[Haotian Zhang]

snd_ice1712_probe() performs multiple initialization steps after
snd_card_new(), but directly returns on failures from later steps
without releasing the ALSA card, causing resource leaks when
probing fails.

Use snd_devm_card_new() together with scope-based cleanup
via __free(snd_card_unref), and clear the card pointer after
successful registration to keep it alive.

Fixes: ca642da4b33d ("ALSA: ice1712: Allocate resources with device-managed APIs")
Suggested-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Haotian Zhang <vulab@xxxxxxxxxxx>
---
changes in v2:
  - Use the auto-cleanup instead as suggested by Takashi Iwai.
---
 sound/pci/ice1712/ice1712.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/pci/ice1712/ice1712.c b/sound/pci/ice1712/ice1712.c
index 1e39b985bef2..6dc9d1183d37 100644
--- a/sound/pci/ice1712/ice1712.c
+++ b/sound/pci/ice1712/ice1712.c
@@ -2515,7 +2515,7 @@ static int snd_ice1712_probe(struct pci_dev *pci,
 			     const struct pci_device_id *pci_id)
 {
 	static int dev;
-	struct snd_card *card;
+	struct snd_card *card __free(snd_card_unref) = NULL;
 	struct snd_ice1712 *ice;
 	int pcm_dev = 0, err;
 	const struct snd_ice1712_card_info * const *tbl, *c;
@@ -2527,8 +2527,8 @@ static int snd_ice1712_probe(struct pci_dev *pci,
 		return -ENOENT;
 	}
 
-	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
-			   sizeof(*ice), &card);
+	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+				sizeof(*ice), &card);
 	if (err < 0)
 		return err;
 	ice = card->private_data;
@@ -2632,6 +2632,7 @@ static int snd_ice1712_probe(struct pci_dev *pci,
 	if (err < 0)
 		return err;
 	pci_set_drvdata(pci, card);
+	card = NULL; /* probe succeeded, don't release as error */
 	dev++;
 	return 0;
 }
-- 
2.43.0