From: sunil.m@techveda.org Subject: [PATCH 3/3] staging: ccree: Use platform_get_irq and devm_request_irq Date: Sat, 15 Jul 2017 13:21:56 +0530 Message-ID: <1500105116-30290-4-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_request_irq(), which simplifies driver cleanup paths and driver code. This patch does the following: (a) replace platform_get_resource(), request_irq() and corresponding error handling with platform_get_irq() and devm_request_irq(). (b) remove struct resource pointer(res_irq) in struct ssi_drvdata as it seems redundant. (c) change type of member irq in struct ssi_drvdata from unsigned int to int, as return type of platform_get_irq is int and can be used in error handling. (d) remove irq_registered variable from driver probe as it seems redundant. (e) free_irq is not required any more, devm_request_irq() free's it on driver detach. (f) adjust log messages accordingly and remove any 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 | 29 +++++++++-------------------- drivers/staging/ccree/ssi_driver.h | 3 +-- 2 files changed, 10 insertions(+), 22 deletions(-) diff --git a/drivers/staging/ccree/ssi_driver.c b/drivers/staging/ccree/ssi_driver.c index dca0ce8..11b62d0 100644 --- a/drivers/staging/ccree/ssi_driver.c +++ b/drivers/staging/ccree/ssi_driver.c @@ -223,7 +223,6 @@ 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; struct device *dev = &plat_dev->dev; struct device_node *np = dev->of_node; @@ -263,25 +262,22 @@ static int init_cc_resources(struct platform_device *plat_dev) &req_mem_cc_regs->start, new_drvdata->cc_base); cc_base = new_drvdata->cc_base; /* Then IRQ */ - new_drvdata->res_irq = platform_get_resource(plat_dev, IORESOURCE_IRQ, 0); - if (unlikely(!new_drvdata->res_irq)) { + new_drvdata->irq = platform_get_irq(plat_dev, 0); + if (new_drvdata->irq < 0) { SSI_LOG_ERR("Failed getting IRQ resource\n"); - rc = -ENODEV; + rc = new_drvdata->irq; goto init_cc_res_err; } - rc = request_irq(new_drvdata->res_irq->start, cc_isr, - IRQF_SHARED, "arm_cc7x", new_drvdata); - if (unlikely(rc != 0)) { - SSI_LOG_ERR("Could not register to interrupt %llu\n", - (unsigned long long)new_drvdata->res_irq->start); + rc = devm_request_irq(&plat_dev->dev, new_drvdata->irq, cc_isr, + IRQF_SHARED, "arm_cc7x", new_drvdata); + if (rc) { + SSI_LOG_ERR("Could not register to interrupt: %d\n", + new_drvdata->irq); goto init_cc_res_err; } init_completion(&new_drvdata->icache_setup_completion); - irq_registered = true; - SSI_LOG_DEBUG("Registered to IRQ (%s) %llu\n", - new_drvdata->res_irq->name, - (unsigned long long)new_drvdata->res_irq->start); + SSI_LOG_DEBUG("Registered to IRQ: %d\n", new_drvdata->irq); new_drvdata->plat_dev = plat_dev; @@ -408,10 +404,6 @@ static int init_cc_resources(struct platform_device *plat_dev) #ifdef ENABLE_CC_SYSFS ssi_sysfs_fini(); #endif - if (irq_registered) { - free_irq(new_drvdata->res_irq->start, new_drvdata); - new_drvdata->res_irq = NULL; - } dev_set_drvdata(&plat_dev->dev, NULL); } return rc; @@ -441,11 +433,8 @@ static void cleanup_cc_resources(struct platform_device *plat_dev) #ifdef ENABLE_CC_SYSFS ssi_sysfs_fini(); #endif - fini_cc_regs(drvdata); cc_clk_off(drvdata); - free_irq(drvdata->res_irq->start, drvdata); - drvdata->res_irq = NULL; dev_set_drvdata(&plat_dev->dev, NULL); } diff --git a/drivers/staging/ccree/ssi_driver.h b/drivers/staging/ccree/ssi_driver.h index 4b38fe2..6fcd151 100644 --- a/drivers/staging/ccree/ssi_driver.h +++ b/drivers/staging/ccree/ssi_driver.h @@ -129,9 +129,8 @@ struct ssi_crypto_req { * @fw_ver: SeP loaded firmware version */ struct ssi_drvdata { - struct resource *res_irq; void __iomem *cc_base; - unsigned int irq; + int irq; u32 irq_mask; u32 fw_ver; /* Calibration time of start/stop -- 1.9.1