linux-kernel - [PATCH 5.17 026/219] ALSA: bt87x: Fix the missing snd_card

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Message-Id: <20220418121204.826001521@linuxfoundation.org>
Date:   Mon, 18 Apr 2022 14:09:55 +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 5.17 026/219] ALSA: bt87x: Fix the missing snd_card_free() call at probe error

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

commit f0438155273f057fec9818bc9d1b782ba35cf6a1 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: 9e80ed64a006 ("ALSA: bt87x: Allocate resources with device-managed APIs")
Cc: <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20220412102636.16000-29-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/pci/bt87x.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/sound/pci/bt87x.c
+++ b/sound/pci/bt87x.c
@@ -805,8 +805,8 @@ static int snd_bt87x_detect_card(struct
 	return SND_BT87X_BOARD_UNKNOWN;
 }
 
-static int snd_bt87x_probe(struct pci_dev *pci,
-			   const struct pci_device_id *pci_id)
+static int __snd_bt87x_probe(struct pci_dev *pci,
+			     const struct pci_device_id *pci_id)
 {
 	static int dev;
 	struct snd_card *card;
@@ -889,6 +889,12 @@ static int snd_bt87x_probe(struct pci_de
 	return 0;
 }
 
+static int snd_bt87x_probe(struct pci_dev *pci,
+			   const struct pci_device_id *pci_id)
+{
+	return snd_card_free_on_error(&pci->dev, __snd_bt87x_probe(pci, pci_id));
+}
+
 /* default entries for all Bt87x cards - it's not exported */
 /* driver_data is set to 0 to call detection */
 static const struct pci_device_id snd_bt87x_default_ids[] = {