[PATCH RESEND 4/7] watchdog: nuc900_wdt: use devm_*() functions

[Jingoo Han]

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

Signed-off-by: Jingoo Han <jg1....@samsung.com>
---
 drivers/watchdog/nuc900_wdt.c |   45 ++++++++--------------------------------
 1 files changed, 9 insertions(+), 36 deletions(-)

diff --git a/drivers/watchdog/nuc900_wdt.c b/drivers/watchdog/nuc900_wdt.c
index 04c45a1..89e8991 100644
--- a/drivers/watchdog/nuc900_wdt.c
+++ b/drivers/watchdog/nuc900_wdt.c
@@ -246,7 +246,8 @@ static int nuc900wdt_probe(struct platform_device *pdev)
 {
        int ret = 0;
 
-       nuc900_wdt = kzalloc(sizeof(struct nuc900_wdt), GFP_KERNEL);
+       nuc900_wdt = devm_kzalloc(&pdev->dev, sizeof(struct nuc900_wdt),
+                               GFP_KERNEL);
        if (!nuc900_wdt)
                return -ENOMEM;
 
@@ -257,30 +258,18 @@ static int nuc900wdt_probe(struct platform_device *pdev)
        nuc900_wdt->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (nuc900_wdt->res == NULL) {
                dev_err(&pdev->dev, "no memory resource specified\n");
-               ret = -ENOENT;
-               goto err_get;
+               return -ENOENT;
        }
 
-       if (!request_mem_region(nuc900_wdt->res->start,
-                               resource_size(nuc900_wdt->res), pdev->name)) {
-               dev_err(&pdev->dev, "failed to get memory region\n");
-               ret = -ENOENT;
-               goto err_get;
-       }
-
-       nuc900_wdt->wdt_base = ioremap(nuc900_wdt->res->start,
-                                       resource_size(nuc900_wdt->res));
-       if (nuc900_wdt->wdt_base == NULL) {
-               dev_err(&pdev->dev, "failed to ioremap() region\n");
-               ret = -EINVAL;
-               goto err_req;
-       }
+       nuc900_wdt->wdt_base = devm_ioremap_resource(&pdev->dev,
+                                               nuc900_wdt->res);
+       if (IS_ERR(nuc900_wdt->wdt_base))
+               return PTR_ERR(nuc900_wdt->wdt_base);
 
-       nuc900_wdt->wdt_clock = clk_get(&pdev->dev, NULL);
+       nuc900_wdt->wdt_clock = devm_clk_get(&pdev->dev, NULL);
        if (IS_ERR(nuc900_wdt->wdt_clock)) {
                dev_err(&pdev->dev, "failed to find watchdog clock source\n");
-               ret = PTR_ERR(nuc900_wdt->wdt_clock);
-               goto err_map;
+               return PTR_ERR(nuc900_wdt->wdt_clock);
        }
 
        clk_enable(nuc900_wdt->wdt_clock);
@@ -298,14 +287,6 @@ static int nuc900wdt_probe(struct platform_device *pdev)
 
 err_clk:
        clk_disable(nuc900_wdt->wdt_clock);
-       clk_put(nuc900_wdt->wdt_clock);
-err_map:
-       iounmap(nuc900_wdt->wdt_base);
-err_req:
-       release_mem_region(nuc900_wdt->res->start,
-                                       resource_size(nuc900_wdt->res));
-err_get:
-       kfree(nuc900_wdt);
        return ret;
 }
 
@@ -314,14 +295,6 @@ static int nuc900wdt_remove(struct platform_device *pdev)
        misc_deregister(&nuc900wdt_miscdev);
 
        clk_disable(nuc900_wdt->wdt_clock);
-       clk_put(nuc900_wdt->wdt_clock);
-
-       iounmap(nuc900_wdt->wdt_base);
-
-       release_mem_region(nuc900_wdt->res->start,
-                                       resource_size(nuc900_wdt->res));
-
-       kfree(nuc900_wdt);
 
        return 0;
 }
-- 
1.7.2.5


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