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watchdog: ts72xx_wdt: use devm_*() functions

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Use devm_*() functions to make cleanup paths simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Jingoo Han 2013-05-02 14:52:16 +09:00 committed by Wim Van Sebroeck
parent b94828ffb2
commit 9d8a7f16f4
1 changed files with 10 additions and 57 deletions
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67
drivers/watchdog/ts72xx_wdt.c
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@ -396,7 +396,7 @@ static int ts72xx_wdt_probe(struct platform_device *pdev)
struct resource *r1, *r2;
int error = 0;
wdt = kzalloc(sizeof(struct ts72xx_wdt), GFP_KERNEL);
wdt = devm_kzalloc(&pdev->dev, sizeof(struct ts72xx_wdt), GFP_KERNEL);
if (!wdt) {
dev_err(&pdev->dev, "failed to allocate memory\n");
return -ENOMEM;
@ -405,44 +405,22 @@ static int ts72xx_wdt_probe(struct platform_device *pdev)
r1 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r1) {
dev_err(&pdev->dev, "failed to get memory resource\n");
error = -ENODEV;
goto fail;
return -ENODEV;
}
r1 = request_mem_region(r1->start, resource_size(r1), pdev->name);
if (!r1) {
dev_err(&pdev->dev, "cannot request memory region\n");
error = -EBUSY;
goto fail;
}
wdt->control_reg = ioremap(r1->start, resource_size(r1));
if (!wdt->control_reg) {
dev_err(&pdev->dev, "failed to map memory\n");
error = -ENODEV;
goto fail_free_control;
}
wdt->control_reg = devm_ioremap_resource(&pdev->dev, r1);
if (IS_ERR(wdt->control_reg))
return PTR_ERR(wdt->control_reg);
r2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!r2) {
dev_err(&pdev->dev, "failed to get memory resource\n");
error = -ENODEV;
goto fail_unmap_control;
return -ENODEV;
}
r2 = request_mem_region(r2->start, resource_size(r2), pdev->name);
if (!r2) {
dev_err(&pdev->dev, "cannot request memory region\n");
error = -EBUSY;
goto fail_unmap_control;
}
wdt->feed_reg = ioremap(r2->start, resource_size(r2));
if (!wdt->feed_reg) {
dev_err(&pdev->dev, "failed to map memory\n");
error = -ENODEV;
goto fail_free_feed;
}
wdt->feed_reg = devm_ioremap_resource(&pdev->dev, r2);
if (IS_ERR(wdt->feed_reg))
return PTR_ERR(wdt->feed_reg);
platform_set_drvdata(pdev, wdt);
ts72xx_wdt_pdev = pdev;
@ -455,45 +433,20 @@ static int ts72xx_wdt_probe(struct platform_device *pdev)
error = misc_register(&ts72xx_wdt_miscdev);
if (error) {
dev_err(&pdev->dev, "failed to register miscdev\n");
goto fail_unmap_feed;
return error;
}
dev_info(&pdev->dev, "TS-72xx Watchdog driver\n");
return 0;
fail_unmap_feed:
platform_set_drvdata(pdev, NULL);
iounmap(wdt->feed_reg);
fail_free_feed:
release_mem_region(r2->start, resource_size(r2));
fail_unmap_control:
iounmap(wdt->control_reg);
fail_free_control:
release_mem_region(r1->start, resource_size(r1));
fail:
kfree(wdt);
return error;
}
static int ts72xx_wdt_remove(struct platform_device *pdev)
{
struct ts72xx_wdt *wdt = platform_get_drvdata(pdev);
struct resource *res;
int error;
error = misc_deregister(&ts72xx_wdt_miscdev);
platform_set_drvdata(pdev, NULL);
iounmap(wdt->feed_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
release_mem_region(res->start, resource_size(res));
iounmap(wdt->control_reg);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, resource_size(res));
kfree(wdt);
return error;
}