netdev - [PATCH net] net: bgmac: Drop free_netdev() from bgmac_enet

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Date:   Wed,  9 Nov 2022 15:01:36 +0000
From:   Wei Yongjun <weiyongjun@...weicloud.com>
To:     Rafał Miłecki <rafal@...ecki.pl>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Florian Fainelli <f.fainelli@...il.com>
Cc:     Wei Yongjun <weiyongjun1@...wei.com>, netdev@...r.kernel.org
Subject: [PATCH net] net: bgmac: Drop free_netdev() from bgmac_enet_remove()

From: Wei Yongjun <weiyongjun1@...wei.com>

netdev is allocated in bgmac_alloc() with devm_alloc_etherdev() and will
be auto released in ->remove and ->probe failure path. Using free_netdev()
in bgmac_enet_remove() leads to double free.

Fixes: 34a5102c3235 ("net: bgmac: allocate struct bgmac just once & don't copy it")
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 5fb3af5670ec..3038386a5afd 100644
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -1568,7 +1568,6 @@ void bgmac_enet_remove(struct bgmac *bgmac)
 	phy_disconnect(bgmac->net_dev->phydev);
 	netif_napi_del(&bgmac->napi);
 	bgmac_dma_free(bgmac);
-	free_netdev(bgmac->net_dev);
 }
 EXPORT_SYMBOL_GPL(bgmac_enet_remove);
 
-- 
2.34.1