linux-kernel - [PATCH 5.17 044/219] ALSA: lola: Fix the missing snd_card

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Message-Id: <20220418121206.010623072@linuxfoundation.org>
Date:   Mon, 18 Apr 2022 14:10:13 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Takashi Iwai <tiwai@...e.de>
Subject: [PATCH 5.17 044/219] ALSA: lola: Fix the missing snd_card_free() call at probe error

From: Takashi Iwai <tiwai@...e.de>

commit d04e84b9817c652002f0ee9b42059d41493e9118 upstream.

The previous cleanup with devres may lead to the incorrect release
orders at the probe error handling due to the devres's nature.  Until
we register the card, snd_card_free() has to be called at first for
releasing the stuff properly when the driver tries to manage and
release the stuff via card->private_free().

This patch fixes it by calling snd_card_free() on the error from the
probe callback using a new helper function.

Fixes: 098fe3d6e775 ("ALSA: lola: Allocate resources with device-managed APIs")
Cc: <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20220412102636.16000-30-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/pci/lola/lola.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/sound/pci/lola/lola.c
+++ b/sound/pci/lola/lola.c
@@ -637,8 +637,8 @@ static int lola_create(struct snd_card *
 	return 0;
 }
 
-static int lola_probe(struct pci_dev *pci,
-		      const struct pci_device_id *pci_id)
+static int __lola_probe(struct pci_dev *pci,
+			const struct pci_device_id *pci_id)
 {
 	static int dev;
 	struct snd_card *card;
@@ -687,6 +687,12 @@ static int lola_probe(struct pci_dev *pc
 	return 0;
 }
 
+static int lola_probe(struct pci_dev *pci,
+		      const struct pci_device_id *pci_id)
+{
+	return snd_card_free_on_error(&pci->dev, __lola_probe(pci, pci_id));
+}
+
 /* PCI IDs */
 static const struct pci_device_id lola_ids[] = {
 	{ PCI_VDEVICE(DIGIGRAM, 0x0001) },