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Don't return success. Fixes: 78b5f6f8855e ("PCI: qcom: Add OPP support to scale performance") Signed-off-by: Dan Carpenter Reviewed-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pcie-qcom.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 26405fcfa499..1d36311f9adb 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -1574,7 +1574,8 @@ static int qcom_pcie_probe(struct platform_device *pdev) if (!ret) { opp = dev_pm_opp_find_freq_floor(dev, &max_freq); if (IS_ERR(opp)) { - dev_err_probe(pci->dev, PTR_ERR(opp), + ret = PTR_ERR(opp); + dev_err_probe(pci->dev, ret, "Unable to find max freq OPP\n"); goto err_pm_runtime_put; } else { From patchwork Mon Jul 8 18:05:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Carpenter X-Patchwork-Id: 811554 Received: from mail-oi1-f175.google.com (mail-oi1-f175.google.com [209.85.167.175]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D5655148FFC for ; 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Mon, 08 Jul 2024 11:05:47 -0700 (PDT) Received: from localhost ([2603:8080:b800:f700:cdd0:d497:b7b2:fe]) by smtp.gmail.com with ESMTPSA id 5614622812f47-3d93acff184sm76287b6e.10.2024.07.08.11.05.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Jul 2024 11:05:47 -0700 (PDT) From: Dan Carpenter To: Krishna chaitanya chundru Cc: Dan Carpenter , Manivannan Sadhasivam , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Bjorn Helgaas , linux-arm-msm@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/3] PCI: qcom: Prevent potential error pointer dereference Date: Mon, 8 Jul 2024 13:05:37 -0500 Message-ID: <20240708180539.1447307-3-dan.carpenter@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240708180539.1447307-1-dan.carpenter@linaro.org> References: <20240708180539.1447307-1-dan.carpenter@linaro.org> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Only call dev_pm_opp_put() if dev_pm_opp_find_freq_exact() succeeds. Otherwise it leads to an error pointer dereference. Fixes: 78b5f6f8855e ("PCI: qcom: Add OPP support to scale performance") Signed-off-by: Dan Carpenter Reviewed-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pcie-qcom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 1d36311f9adb..e06c4ad3a72a 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -1443,8 +1443,8 @@ static void qcom_pcie_icc_opp_update(struct qcom_pcie *pcie) if (ret) dev_err(pci->dev, "Failed to set OPP for freq (%lu): %d\n", freq_kbps * width, ret); + dev_pm_opp_put(opp); } - dev_pm_opp_put(opp); } } From patchwork Mon Jul 8 18:05:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dan Carpenter X-Patchwork-Id: 811207 Received: from mail-ot1-f41.google.com (mail-ot1-f41.google.com [209.85.210.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C449214A619 for ; 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Mon, 08 Jul 2024 11:05:49 -0700 (PDT) Received: from localhost ([2603:8080:b800:f700:cdd0:d497:b7b2:fe]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-70374f7a2d3sm86559a34.32.2024.07.08.11.05.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Jul 2024 11:05:49 -0700 (PDT) From: Dan Carpenter To: Krishna chaitanya chundru Cc: Dan Carpenter , Manivannan Sadhasivam , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Bjorn Helgaas , linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/3] PCI: qcom: Potential uninitialized variable in qcom_pcie_suspend_noirq() Date: Mon, 8 Jul 2024 13:05:38 -0500 Message-ID: <20240708180539.1447307-4-dan.carpenter@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240708180539.1447307-1-dan.carpenter@linaro.org> References: <20240708180539.1447307-1-dan.carpenter@linaro.org> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Smatch complains that "ret" could be uninitialized if "pcie->icc_mem" is NULL and "pm_suspend_target_state == PM_SUSPEND_MEM". Silence this warning by initializing ret to zero. Fixes: 78b5f6f8855e ("PCI: qcom: Add OPP support to scale performance") Signed-off-by: Dan Carpenter Reviewed-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pcie-qcom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index e06c4ad3a72a..74e2acf4ae11 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -1633,7 +1633,7 @@ static int qcom_pcie_probe(struct platform_device *pdev) static int qcom_pcie_suspend_noirq(struct device *dev) { struct qcom_pcie *pcie = dev_get_drvdata(dev); - int ret; + int ret = 0; /* * Set minimum bandwidth required to keep data path functional during