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drivers/gpio: simplify use of devm_ioremap_resource 

Remove unneeded error handling on the result of a call to
platform_get_resource when the value is passed to devm_ioremap_resource.

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 semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression pdev,res,n,e,e1;
expression ret != 0;
identifier l;
@@

- res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  ... when != res
- if (res == NULL) { ... \(goto l;\|return ret;\) }
  ... when != res
+ res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  e = devm_ioremap_resource(e1, res);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Julia Lawall 2013-08-14 11:11:07 +02:00 committed by Linus Walleij
parent 388f430841
commit 08a67a58af
2 changed files with 2 additions and 12 deletions
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7
drivers/gpio/gpio-mvebu.c
View File

@ -566,12 +566,6 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
else
soc_variant = MVEBU_GPIO_SOC_VARIANT_ORION;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Cannot get memory resource\n");
return -ENODEV;
}
mvchip = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_gpio_chip), GFP_KERNEL);
if (!mvchip) {
dev_err(&pdev->dev, "Cannot allocate memory\n");
@ -611,6 +605,7 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
mvchip->chip.dbg_show = mvebu_gpio_dbg_show;
spin_lock_init(&mvchip->lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mvchip->membase = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(mvchip->membase))
return PTR_ERR(mvchip->membase);

7
drivers/gpio/gpio-spear-spics.c
View File

@ -128,18 +128,13 @@ static int spics_gpio_probe(struct platform_device *pdev)
struct resource *res;
int ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "invalid IORESOURCE_MEM\n");
return -EBUSY;
}
spics = devm_kzalloc(&pdev->dev, sizeof(*spics), GFP_KERNEL);
if (!spics) {
dev_err(&pdev->dev, "memory allocation fail\n");
return -ENOMEM;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
spics->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(spics->base))
return PTR_ERR(spics->base);