From: sunil.m@techveda.org Subject: [PATCH 1/3] staging: ccree: Replace kzalloc with devm_kzalloc Date: Sat, 15 Jul 2017 13:21:54 +0530 Message-ID: <1500105116-30290-2-git-send-email-sunil.m@techveda.org> References: <1500105116-30290-1-git-send-email-sunil.m@techveda.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: devel@driverdev.osuosl.org, driverdev-devel@linuxdriverproject.org, karthik@techveda.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, Suniel Mahesh To: gregkh@linuxfoundation.org, gilad@benyossef.com Return-path: In-Reply-To: <1500105116-30290-1-git-send-email-sunil.m@techveda.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" List-Id: linux-crypto.vger.kernel.org From: Suniel Mahesh It is recommended to use managed function devm_kzalloc, which simplifies driver cleanup paths and driver code. This patch does the following: (a) replace kzalloc with devm_kzalloc. (b) drop kfree(), because memory allocated with devm_kzalloc() is automatically freed on driver detach, otherwise it leads to a double free. (c) remove unnecessary blank lines. Signed-off-by: Suniel Mahesh --- Note: - Patch was tested and built(ARCH=arm) on next-20170714. No build issues reported, however it was not tested on real hardware. --- drivers/staging/ccree/ssi_driver.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/staging/ccree/ssi_driver.c b/drivers/staging/ccree/ssi_driver.c index 78709b92..f231ecf 100644 --- a/drivers/staging/ccree/ssi_driver.c +++ b/drivers/staging/ccree/ssi_driver.c @@ -224,13 +224,15 @@ static int init_cc_resources(struct platform_device *plat_dev) struct resource *req_mem_cc_regs = NULL; void __iomem *cc_base = NULL; bool irq_registered = false; - struct ssi_drvdata *new_drvdata = kzalloc(sizeof(struct ssi_drvdata), GFP_KERNEL); + struct ssi_drvdata *new_drvdata; struct device *dev = &plat_dev->dev; struct device_node *np = dev->of_node; u32 signature_val; int rc = 0; - if (unlikely(!new_drvdata)) { + new_drvdata = devm_kzalloc(&plat_dev->dev, sizeof(struct ssi_drvdata), + GFP_KERNEL); + if (!new_drvdata) { SSI_LOG_ERR("Failed to allocate drvdata"); rc = -ENOMEM; goto init_cc_res_err; @@ -431,10 +433,8 @@ static int init_cc_resources(struct platform_device *plat_dev) resource_size(new_drvdata->res_mem)); new_drvdata->res_mem = NULL; } - kfree(new_drvdata); dev_set_drvdata(&plat_dev->dev, NULL); } - return rc; } @@ -475,8 +475,6 @@ static void cleanup_cc_resources(struct platform_device *plat_dev) drvdata->cc_base = NULL; drvdata->res_mem = NULL; } - - kfree(drvdata); dev_set_drvdata(&plat_dev->dev, NULL); } -- 1.9.1