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(p200300ea8f10c20075d17bfc8928d5ba.dip0.t-ipconnect.de. [2003:ea:8f10:c200:75d1:7bfc:8928:d5ba]) by smtp.googlemail.com with ESMTPSA id z6sm6225818wmp.1.2021.08.05.12.08.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Aug 2021 12:08:32 -0700 (PDT) To: Jakub Kicinski , David Miller Cc: "netdev@vger.kernel.org" , Julian Wiedmann From: Heiner Kallweit Subject: [PATCH net-next] ethtool: return error from ethnl_ops_begin if dev is NULL Message-ID: <21a1abb0-300f-ccae-56da-16f016c4fff2@gmail.com> Date: Thu, 5 Aug 2021 21:08:22 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Julian reported that after d43c65b05b84 Coverity complains about a missing check whether dev is NULL in ethnl_ops_complete(). There doesn't seem to be any valid case where dev could be NULL when calling ethnl_ops_begin(), therefore return an error if dev is NULL. Fixes: d43c65b05b84 ("ethtool: runtime-resume netdev parent in ethnl_ops_begin") Reported-by: Julian Wiedmann Signed-off-by: Heiner Kallweit --- net/ethtool/netlink.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c index 417aaf9ca..fe8bf2b3c 100644 --- a/net/ethtool/netlink.c +++ b/net/ethtool/netlink.c @@ -35,7 +35,7 @@ int ethnl_ops_begin(struct net_device *dev) int ret; if (!dev) - return 0; + return -ENODEV; if (dev->dev.parent) pm_runtime_get_sync(dev->dev.parent); @@ -61,7 +61,7 @@ int ethnl_ops_begin(struct net_device *dev) void ethnl_ops_complete(struct net_device *dev) { - if (dev && dev->ethtool_ops->complete) + if (dev->ethtool_ops->complete) dev->ethtool_ops->complete(dev); if (dev->dev.parent)