From: Gilad Ben-Yossef Subject: [PATCH 1/3] staging: ccree: Replace kzalloc with devm_kzalloc Date: Thu, 27 Jul 2017 17:27:32 +0300 Message-ID: <1501165654-30601-1-git-send-email-gilad@benyossef.com> References: Cc: Ofir Drang , Suniel Mahesh To: Greg Kroah-Hartman , linux-crypto@vger.kernel.org, driverdev-devel@linuxdriverproject.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Return-path: Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:47390 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751539AbdG0O1n (ORCPT ); Thu, 27 Jul 2017 10:27:43 -0400 In-Reply-To: Sender: linux-crypto-owner@vger.kernel.org List-ID: 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 [gby: rebase on top of latest coding style fixes changes] Acked-by: Gilad Ben-Yossef --- 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 1cae2b7..97dfc2c 100644 --- a/drivers/staging/ccree/ssi_driver.c +++ b/drivers/staging/ccree/ssi_driver.c @@ -223,13 +223,15 @@ 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(*new_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(*new_drvdata), + GFP_KERNEL); + if (!new_drvdata) { SSI_LOG_ERR("Failed to allocate drvdata"); rc = -ENOMEM; goto init_cc_res_err; @@ -434,10 +436,8 @@ 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; } @@ -478,8 +478,6 @@ 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); } -- 2.1.4