linux-kernel - [PATCH 5.15 033/189] ALSA: es1938: Fix the missing snd_card

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Date:   Mon, 18 Apr 2022 14:10:53 +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 5.15 033/189] ALSA: es1938: Fix the missing snd_card_free() call at probe error

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

commit bc22628591e5913e67edb3c2a89b97849e30a8f8 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: 08e9d3ab4cc1 ("ALSA: es1938: Allocate resources with device-managed APIs")
Cc: <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20220412102636.16000-15-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/pci/es1938.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/sound/pci/es1938.c b/sound/pci/es1938.c
index 00b976f42a3d..e34ec6f89e7e 100644
--- a/sound/pci/es1938.c
+++ b/sound/pci/es1938.c
@@ -1716,8 +1716,8 @@ static int snd_es1938_mixer(struct es1938 *chip)
 }
        
 
-static int snd_es1938_probe(struct pci_dev *pci,
-			    const struct pci_device_id *pci_id)
+static int __snd_es1938_probe(struct pci_dev *pci,
+			      const struct pci_device_id *pci_id)
 {
 	static int dev;
 	struct snd_card *card;
@@ -1796,6 +1796,12 @@ static int snd_es1938_probe(struct pci_dev *pci,
 	return 0;
 }
 
+static int snd_es1938_probe(struct pci_dev *pci,
+			    const struct pci_device_id *pci_id)
+{
+	return snd_card_free_on_error(&pci->dev, __snd_es1938_probe(pci, pci_id));
+}
+
 static struct pci_driver es1938_driver = {
 	.name = KBUILD_MODNAME,
 	.id_table = snd_es1938_ids,
-- 
2.35.2