linux-kernel - [PATCH 5.17 054/219] ALSA: via82xx: Fix the missing snd_card

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Date:   Mon, 18 Apr 2022 14:10:23 +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 5.17 054/219] ALSA: via82xx: Fix the missing snd_card_free() call at probe error

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

commit 27a0963f9cea5be3c68281f07fe82cdf712ef333 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: afaf99751d0c ("ALSA: via82xx: Allocate resources with device-managed APIs")
Cc: <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20220412102636.16000-26-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/pci/via82xx.c       |   10 ++++++++--
 sound/pci/via82xx_modem.c |   10 ++++++++--
 2 files changed, 16 insertions(+), 4 deletions(-)

--- a/sound/pci/via82xx.c
+++ b/sound/pci/via82xx.c
@@ -2458,8 +2458,8 @@ static int check_dxs_list(struct pci_dev
 	return VIA_DXS_48K;
 };
 
-static int snd_via82xx_probe(struct pci_dev *pci,
-			     const struct pci_device_id *pci_id)
+static int __snd_via82xx_probe(struct pci_dev *pci,
+			       const struct pci_device_id *pci_id)
 {
 	struct snd_card *card;
 	struct via82xx *chip;
@@ -2569,6 +2569,12 @@ static int snd_via82xx_probe(struct pci_
 	return 0;
 }
 
+static int snd_via82xx_probe(struct pci_dev *pci,
+			     const struct pci_device_id *pci_id)
+{
+	return snd_card_free_on_error(&pci->dev, __snd_via82xx_probe(pci, pci_id));
+}
+
 static struct pci_driver via82xx_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = snd_via82xx_ids,
--- a/sound/pci/via82xx_modem.c
+++ b/sound/pci/via82xx_modem.c
@@ -1103,8 +1103,8 @@ static int snd_via82xx_create(struct snd
 }
 
 
-static int snd_via82xx_probe(struct pci_dev *pci,
-			     const struct pci_device_id *pci_id)
+static int __snd_via82xx_probe(struct pci_dev *pci,
+			       const struct pci_device_id *pci_id)
 {
 	struct snd_card *card;
 	struct via82xx_modem *chip;
@@ -1157,6 +1157,12 @@ static int snd_via82xx_probe(struct pci_
 	return 0;
 }
 
+static int snd_via82xx_probe(struct pci_dev *pci,
+			     const struct pci_device_id *pci_id)
+{
+	return snd_card_free_on_error(&pci->dev, __snd_via82xx_probe(pci, pci_id));
+}
+
 static struct pci_driver via82xx_modem_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = snd_via82xx_modem_ids,