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gpio: amd8111: Use devm_request_region

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By the time request_region is called in the AMD 8111 GPIO driver, a
corresponding device structure has already been allocated. The
devm_request_region function should be used to help simplify the cleanup
code and reduce the possible points of failure.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
William Breathitt Gray 2016-02-03 15:17:13 -05:00 committed by Linus Walleij
parent cb32389cb9
commit 35568c40bd
1 changed files with 3 additions and 4 deletions
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7
drivers/gpio/gpio-amd8111.c
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@ -25,6 +25,7 @@
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/gpio.h>
@ -204,7 +205,8 @@ static int __init amd_gpio_init(void)
gp.pmbase &= 0x0000FF00;
if (gp.pmbase == 0)
goto out;
if (!request_region(gp.pmbase + PMBASE_OFFSET, PMBASE_SIZE, "AMD GPIO")) {
if (!devm_request_region(&pdev->dev, gp.pmbase + PMBASE_OFFSET,
PMBASE_SIZE, "AMD GPIO")) {
dev_err(&pdev->dev, "AMD GPIO region 0x%x already in use!\n",
gp.pmbase + PMBASE_OFFSET);
err = -EBUSY;
@ -213,7 +215,6 @@ static int __init amd_gpio_init(void)
gp.pm = ioport_map(gp.pmbase + PMBASE_OFFSET, PMBASE_SIZE);
if (!gp.pm) {
dev_err(&pdev->dev, "Couldn't map io port into io memory\n");
release_region(gp.pmbase + PMBASE_OFFSET, PMBASE_SIZE);
err = -ENOMEM;
goto out;
}
@ -228,7 +229,6 @@ static int __init amd_gpio_init(void)
printk(KERN_ERR "GPIO registering failed (%d)\n",
err);
ioport_unmap(gp.pm);
release_region(gp.pmbase + PMBASE_OFFSET, PMBASE_SIZE);
goto out;
}
out:
@ -239,7 +239,6 @@ static void __exit amd_gpio_exit(void)
{
gpiochip_remove(&gp.chip);
ioport_unmap(gp.pm);
release_region(gp.pmbase + PMBASE_OFFSET, PMBASE_SIZE);
}
module_init(amd_gpio_init);