linux-kernel - [PATCH] wifi: mt76: mt7921: fix missing unwind goto in `mt7921u

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Message-Id: <20230412062234.4810-1-jiefeng_li@hust.edu.cn>
Date:   Wed, 12 Apr 2023 14:22:34 +0800
From:   Jiefeng Li <jiefeng_li@...t.edu.cn>
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>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Jiefeng Li <jiefeng_li@...t.edu.cn>,
        Dongliang Mu <dzm91@...t.edu.cn>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH] wifi: mt76: mt7921: fix missing unwind goto in `mt7921u_probe`

`mt7921u_dma_init` can only return zero or negative number according to its
definition. When it returns non-zero number, there exists an error and this
function should handle this error rather than return directly.

Fixes: 0d2afe09fad5 ("mt76: mt7921: add mt7921u driver")
Signed-off-by: Jiefeng Li <jiefeng_li@...t.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@...t.edu.cn>
---
The issue is discovered by static analysis, and the patch is not tested yet.
---
 drivers/net/wireless/mediatek/mt76/mt7921/usb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/usb.c b/drivers/net/wireless/mediatek/mt76/mt7921/usb.c
index 8fef09ed29c9..70c9bbdbf60e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/usb.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/usb.c
@@ -272,7 +272,7 @@ static int mt7921u_probe(struct usb_interface *usb_intf,
 
 	ret = mt7921u_dma_init(dev, false);
 	if (ret)
-		return ret;
+		goto error;
 
 	hw = mt76_hw(dev);
 	/* check hw sg support in order to enable AMSDU */
-- 
2.34.1