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[34.77.178.169]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38bf321508esm70310f8f.10.2025.01.16.06.49.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Jan 2025 06:49:26 -0800 (PST) From: Tudor Ambarus Date: Thu, 16 Jan 2025 14:49:05 +0000 Subject: [PATCH 1/4] soc: qcom: ice: introduce devm_of_qcom_ice_get Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250116-qcom-ice-fix-dev-leak-v1-1-84d937683790@linaro.org> References: <20250116-qcom-ice-fix-dev-leak-v1-0-84d937683790@linaro.org> In-Reply-To: <20250116-qcom-ice-fix-dev-leak-v1-0-84d937683790@linaro.org> To: Krzysztof Kozlowski , Bjorn Andersson , Konrad Dybcio , Adrian Hunter , Ulf Hansson , Abel Vesa , Manivannan Sadhasivam , "James E.J. Bottomley" , "Martin K. Petersen" , Eric Biggers Cc: linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, andre.draszik@linaro.org, peter.griffin@linaro.org, willmcvicker@google.com, kernel-team@android.com, Tudor Ambarus X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1737038965; l=2250; i=tudor.ambarus@linaro.org; s=20241212; h=from:subject:message-id; bh=yQnJYX0uPLjPaWJCg5DBrwaaox/zrNkiPK9/oReRrBQ=; b=dvOHW0gq57zT7su0+EvrZUYQUdDDd52T/OiLXmz9qbseW7TNEx8fJuXgbrcX10BK9uz7fBYdf xSVXGVPO2zLA8oEk6fKZbw1aWt2g8ht6yA1GYf/x52/vAjCy7Zwwvs+ X-Developer-Key: i=tudor.ambarus@linaro.org; a=ed25519; pk=uQzE0NXo3dIjeowMTOPCpIiPHEz12IA/MbyzrZVh9WI= Callers of of_qcom_ice_get() leak the device reference taken by of_find_device_by_node(). Introduce devm variant for of_qcom_ice_get() to spare consumers of an extra call to put the dev reference. Signed-off-by: Tudor Ambarus --- drivers/soc/qcom/ice.c | 34 ++++++++++++++++++++++++++++++++++ include/soc/qcom/ice.h | 2 ++ 2 files changed, 36 insertions(+) diff --git a/drivers/soc/qcom/ice.c b/drivers/soc/qcom/ice.c index 393d2d1d275f..9cdf0acba6d1 100644 --- a/drivers/soc/qcom/ice.c +++ b/drivers/soc/qcom/ice.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -324,6 +325,39 @@ struct qcom_ice *of_qcom_ice_get(struct device *dev) } EXPORT_SYMBOL_GPL(of_qcom_ice_get); =20 +static void qcom_ice_put(const struct qcom_ice *ice) +{ + struct platform_device *pdev =3D to_platform_device(ice->dev); + + if (!platform_get_resource_byname(pdev, IORESOURCE_MEM, "ice")) + platform_device_put(pdev); +} + +static void devm_of_qcom_ice_put(struct device *dev, void *res) +{ + qcom_ice_put(*(struct qcom_ice **)res); +} + +struct qcom_ice *devm_of_qcom_ice_get(struct device *dev) +{ + struct qcom_ice *ice, **dr; + + dr =3D devres_alloc(devm_of_qcom_ice_put, sizeof(*dr), GFP_KERNEL); + if (!dr) + return ERR_PTR(-ENOMEM); + + ice =3D of_qcom_ice_get(dev); + if (!IS_ERR_OR_NULL(ice)) { + *dr =3D ice; + devres_add(dev, dr); + } else { + devres_free(dr); + } + + return ice; +} +EXPORT_SYMBOL_GPL(devm_of_qcom_ice_get); + static int qcom_ice_probe(struct platform_device *pdev) { struct qcom_ice *engine; diff --git a/include/soc/qcom/ice.h b/include/soc/qcom/ice.h index 5870a94599a2..d5f6a228df65 100644 --- a/include/soc/qcom/ice.h +++ b/include/soc/qcom/ice.h @@ -34,4 +34,6 @@ int qcom_ice_program_key(struct qcom_ice *ice, int slot); int qcom_ice_evict_key(struct qcom_ice *ice, int slot); struct qcom_ice *of_qcom_ice_get(struct device *dev); +struct qcom_ice *devm_of_qcom_ice_get(struct device *dev); + #endif /* __QCOM_ICE_H__ */ --=20 2.48.0.rc2.279.g1de40edade-goog