watchdog: s3c2410_wdt.c: Convert release_resource to release_region/release_mem_region

Request_mem_region should be used with release_mem_region, not
release_resource.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,E;
@@
*x = request_mem_region(...)
... when != release_mem_region(x)
    when != x = E
* release_resource(x);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@kernel.org>

diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index 25b39bf..f7f5aa0 100644 (file)
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -402,7 +402,6 @@ static inline void s3c2410wdt_cpufreq_deregister(void)
 
 static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
 {
-       struct resource *res;
        struct device *dev;
        unsigned int wtcon;
        int started = 0;
@@ -416,20 +415,19 @@ static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
 
        /* get the memory region for the watchdog timer */
 
-       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (res == NULL) {
+       wdt_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (wdt_mem == NULL) {
                dev_err(dev, "no memory resource specified\n");
                return -ENOENT;
        }
 
-       size = resource_size(res);
-       wdt_mem = request_mem_region(res->start, size, pdev->name);
-       if (wdt_mem == NULL) {
+       size = resource_size(wdt_mem);
+       if (!request_mem_region(wdt_mem->start, size, pdev->name)) {
                dev_err(dev, "failed to get memory region\n");
                return -EBUSY;
        }
 
-       wdt_base = ioremap(res->start, size);
+       wdt_base = ioremap(wdt_mem->start, size);
        if (wdt_base == NULL) {
                dev_err(dev, "failed to ioremap() region\n");
                ret = -EINVAL;
@@ -524,8 +522,8 @@ static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
        iounmap(wdt_base);
 
  err_req:
-       release_resource(wdt_mem);
-       kfree(wdt_mem);
+       release_mem_region(wdt_mem->start, size);
+       wdt_mem = NULL;
 
        return ret;
 }
@@ -545,8 +543,7 @@ static int __devexit s3c2410wdt_remove(struct platform_device *dev)
 
        iounmap(wdt_base);
 
-       release_resource(wdt_mem);
-       kfree(wdt_mem);
+       release_mem_region(wdt_mem->start, resource_size(wdt_mem));
        wdt_mem = NULL;
        return 0;
 }