From fa283db76f681b9e17af2c329817042134178e7f Mon Sep 17 00:00:00 2001 From: Amitoj Kaur Chawla Date: Sun, 28 Feb 2016 18:00:56 +0530 Subject: [PATCH] gpio: timberdale: Switch to devm_ioremap_resource() Replace calls to devm_request_mem_region and devm_ioremap with a direct call to devm_ioremap_resource instead and modify error handling. Move the call to platform_get_resource adjacent to the call to devm_ioremap_resource to make the connection between them more clear. A simplified version of the Coccinelle semantic patch that is used to make this change is as follows: // @nm@ expression myname; identifier i; @@ struct platform_driver i = { .driver = { .name = myname } }; @@ expression dev,res,size,e1,e; expression nm.myname; @@ -if (!devm_request_mem_region(dev, res->start, size, - \(res->name\|dev_name(dev)\|myname\))) { - ... - return ...; -} ... when != res->start = e1 e = -devm_ioremap(dev,res->start,size); +devm_ioremap_resource(dev,res); if -(e == NULL) +(IS_ERR(e)) { ... -return ...; +return PTR_ERR(e); } // Further, updated error handling by hand as devm_ioremap_resource gives appropriate error messages, so remove unnecessary error messages. Signed-off-by: Amitoj Kaur Chawla Signed-off-by: Linus Walleij --- drivers/gpio/gpio-timberdale.c | 21 ++++----------------- 1 file changed, 4 insertions(+), 17 deletions(-) diff --git a/drivers/gpio/gpio-timberdale.c b/drivers/gpio/gpio-timberdale.c index f0164ec43921..85ed608c2b27 100644 --- a/drivers/gpio/gpio-timberdale.c +++ b/drivers/gpio/gpio-timberdale.c @@ -237,12 +237,6 @@ static int timbgpio_probe(struct platform_device *pdev) return -EINVAL; } - iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!iomem) { - dev_err(dev, "Unable to get resource\n"); - return -EINVAL; - } - tgpio = devm_kzalloc(dev, sizeof(struct timbgpio), GFP_KERNEL); if (!tgpio) { dev_err(dev, "Memory alloc failed\n"); @@ -252,17 +246,10 @@ static int timbgpio_probe(struct platform_device *pdev) spin_lock_init(&tgpio->lock); - if (!devm_request_mem_region(dev, iomem->start, resource_size(iomem), - DRIVER_NAME)) { - dev_err(dev, "Region already claimed\n"); - return -EBUSY; - } - - tgpio->membase = devm_ioremap(dev, iomem->start, resource_size(iomem)); - if (!tgpio->membase) { - dev_err(dev, "Cannot ioremap\n"); - return -ENOMEM; - } + iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + tgpio->membase = devm_ioremap_resource(dev, iomem); + if (IS_ERR(tgpio->membase)) + return PTR_ERR(tgpio->membase); gc = &tgpio->gpio; -- 2.20.1