linux-kernel - [PATCH] mt76: mt7921: Fix the error handling path of mt7921_pci

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Message-Id: <ca5003e9c6fd2293d7a14ec693e15cc3d6e849a6.1649000427.git.christophe.jaillet@wanadoo.fr>
Date:   Sun,  3 Apr 2022 17:40:33 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Felix Fietkau <nbd@....name>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Shayne Chen <shayne.chen@...iatek.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Deren Wu <deren.wu@...iatek.com>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH] mt76: mt7921: Fix the error handling path of mt7921_pci_probe()

In case of error, some resources must be freed, as already done above and
below the devm_kmemdup() and __mt7921e_mcu_drv_pmctrl() calls added in the
commit in Fixes:.

Fixes: 602cc0c9618a ("mt76: mt7921e: fix possible probe failure after reboot")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
This is more or less a blind fix.
Review with care.
---
 drivers/net/wireless/mediatek/mt76/mt7921/pci.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
index 1a01d025bbe5..062e2b422478 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/pci.c
@@ -302,8 +302,10 @@ static int mt7921_pci_probe(struct pci_dev *pdev,
 	dev->bus_ops = dev->mt76.bus;
 	bus_ops = devm_kmemdup(dev->mt76.dev, dev->bus_ops, sizeof(*bus_ops),
 			       GFP_KERNEL);
-	if (!bus_ops)
-		return -ENOMEM;
+	if (!bus_ops) {
+		ret = -ENOMEM;
+		goto err_free_dev;
+	}
 
 	bus_ops->rr = mt7921_rr;
 	bus_ops->wr = mt7921_wr;
@@ -312,7 +314,7 @@ static int mt7921_pci_probe(struct pci_dev *pdev,
 
 	ret = __mt7921e_mcu_drv_pmctrl(dev);
 	if (ret)
-		return ret;
+		goto err_free_dev;
 
 	mdev->rev = (mt7921_l1_rr(dev, MT_HW_CHIPID) << 16) |
 		    (mt7921_l1_rr(dev, MT_HW_REV) & 0xff);
-- 
2.32.0