watchdog: Convert release_resource to release_region/release_mem_region

Request_mem_region should be used with release_mem_region, not
release_resource.

In pnx4008_wdt.c, a missing clk_put is added as well.

The semantic match that finds the first 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>

1 files changed, 8 insertions, 12 deletions

diff --git a/drivers/watchdog/max63xx_wdt.c b/drivers/watchdog/max63xx_wdt.c
index 7a82ce5a6337..73ba2fd8e591 100644
--- a/drivers/watchdog/max63xx_wdt.c
+++ b/drivers/watchdog/max63xx_wdt.c
@@ -270,7 +270,6 @@ static int __devinit max63xx_wdt_probe(struct platform_device *pdev)
 {
 	int ret = 0;
 	int size;
-	struct resource *res;
 	struct device *dev = &pdev->dev;
 	struct max63xx_timeout *table;
 
@@ -294,21 +293,19 @@ static int __devinit max63xx_wdt_probe(struct platform_device *pdev)
 
 	max63xx_pdev = pdev;
 
-	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, "failed to get memory region resource\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 -ENOENT;
 	}
 
-	wdt_base = ioremap(res->start, size);
+	wdt_base = ioremap(wdt_mem->start, size);
 	if (!wdt_base) {
 		dev_err(dev, "failed to map memory region\n");
 		ret = -ENOMEM;
@@ -326,8 +323,8 @@ static int __devinit max63xx_wdt_probe(struct platform_device *pdev)
 out_unmap:
 	iounmap(wdt_base);
 out_request:
-	release_resource(wdt_mem);
-	kfree(wdt_mem);
+	release_mem_region(wdt_mem->start, size);
+	wdt_mem = NULL;
 
 	return ret;
 }
@@ -336,8 +333,7 @@ static int __devexit max63xx_wdt_remove(struct platform_device *pdev)
 {
 	misc_deregister(&max63xx_wdt_miscdev);
 	if (wdt_mem) {
-		release_resource(wdt_mem);
-		kfree(wdt_mem);
+		release_mem_region(wdt_mem->start, resource_size(wdt_mem));
 		wdt_mem = NULL;
 	}