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[128.101.106.63]) by smtp.gmail.com with ESMTPSA id c14sm3409784iot.13.2019.03.12.00.50.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 12 Mar 2019 00:50:48 -0700 (PDT) From: Kangjie Lu To: kjlu@umn.edu Cc: pakki001@umn.edu, Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S. Miller" , Maxime Ripard , Chen-Yu Tsai , Maxime Coquelin , netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, linux-kernel@vger.kernel.org Subject: [PATCH] net: dwmac-sun8i: fix a missing check of of_get_phy_mode Date: Tue, 12 Mar 2019 02:50:40 -0500 Message-Id: <20190312075040.32115-1-kjlu@umn.edu> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org of_get_phy_mode may fail and return a negative error code; the fix checks the return value of of_get_phy_mode and returns -EINVAL of it fails. Signed-off-by: Kangjie Lu --- drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c index 0f660af01a4b..195669f550f0 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c @@ -1147,7 +1147,10 @@ static int sun8i_dwmac_probe(struct platform_device *pdev) return ret; } - plat_dat->interface = of_get_phy_mode(dev->of_node); + ret = of_get_phy_mode(dev->of_node); + if (ret < 0) + return -EINVAL; + plat_dat->interface = ret; /* platform data specifying hardware features and callbacks. * hardware features were copied from Allwinner drivers. -- 2.17.1