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watchdog: coh901327_wdt: Use devm_ioremap_resource to map resources 

Map resources using devm_ioremap_resource() to simplify error handling.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2017-01-03 03:10:30 -08:00
parent 14da8d427e
commit 30c65b22f0
1 changed files with 5 additions and 26 deletions
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31
drivers/watchdog/coh901327_wdt.c
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@ -68,8 +68,6 @@
/* Default timeout in seconds = 1 minute */
static unsigned int margin = 60;
static resource_size_t phybase;
static resource_size_t physize;
static int irq;
static void __iomem *virtbase;
static struct device *parent;
@ -248,8 +246,6 @@ static int __exit coh901327_remove(struct platform_device *pdev)
free_irq(irq, pdev);
clk_disable_unprepare(clk);
clk_put(clk);
iounmap(virtbase);
release_mem_region(phybase, physize);
return 0;
}
@ -259,30 +255,18 @@ static int __init coh901327_probe(struct platform_device *pdev)
u16 val;
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENOENT;
parent = &pdev->dev;
physize = resource_size(res);
phybase = res->start;
if (request_mem_region(phybase, physize, DRV_NAME) == NULL) {
ret = -EBUSY;
goto out;
}
virtbase = ioremap(phybase, physize);
if (!virtbase) {
ret = -ENOMEM;
goto out_no_remap;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
virtbase = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(virtbase))
return PTR_ERR(virtbase);
clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
dev_err(&pdev->dev, "could not get clock\n");
goto out_no_clk;
return ret;
}
ret = clk_prepare_enable(clk);
if (ret) {
@ -353,11 +337,6 @@ out_no_irq:
clk_disable_unprepare(clk);
out_no_clk_enable:
clk_put(clk);
out_no_clk:
iounmap(virtbase);
out_no_remap:
release_mem_region(phybase, SZ_4K);
out:
return ret;
}