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[104.128.80.227]) by smtp.gmail.com with ESMTPSA id f9sm3306849pfd.141.2020.02.06.05.22.01 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 06 Feb 2020 05:22:04 -0800 (PST) From: Dejin Zheng To: vkoul@kernel.org, peppe.cavallaro@st.com, alexandre.torgue@st.com, joabreu@synopsys.com, davem@davemloft.net, mcoquelin.stm32@gmail.com Subject: [PATCH] net: stmmac: fix a possible endless loop Date: Thu, 6 Feb 2020 21:21:47 +0800 Message-Id: <20200206132147.22874-1-zhengdejin5@gmail.com> X-Mailer: git-send-email 2.25.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200206_052205_606932_C4FDF74A X-CRM114-Status: GOOD ( 10.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: netdev@vger.kernel.org, Dejin Zheng , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org It forgot to reduce the value of the variable retry in a while loop in the ethqos_configure() function. It may cause an endless loop and without timeout. Signed-off-by: Dejin Zheng --- drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c index 7ec895407d23..e0a5fe83d8e0 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c @@ -413,6 +413,7 @@ static int ethqos_configure(struct qcom_ethqos *ethqos) dll_lock = rgmii_readl(ethqos, SDC4_STATUS); if (dll_lock & SDC4_STATUS_DLL_LOCK) break; + retry--; } while (retry > 0); if (!retry) dev_err(ðqos->pdev->dev, -- 2.25.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel