watchdog: sp805: Use devm routines

sp805 driver currently uses normal kzalloc, ioremap, etc routines. This patch
replaces these routines with devm_kzalloc and devm_request_mem_region etc, so
that we don't need to handle freeing of resources for error cases and module
removal routine.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 6e75157..bbb170e 100644 (file)
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -285,32 +285,33 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
 {
        int ret = 0;
 
-       if (!request_mem_region(adev->res.start, resource_size(&adev->res),
-                               "sp805_wdt")) {
+       if (!devm_request_mem_region(&adev->dev, adev->res.start,
+                               resource_size(&adev->res), "sp805_wdt")) {
                dev_warn(&adev->dev, "Failed to get memory region resource\n");
                ret = -ENOENT;
                goto err;
        }
 
-       wdt = kzalloc(sizeof(*wdt), GFP_KERNEL);
+       wdt = devm_kzalloc(&adev->dev, sizeof(*wdt), GFP_KERNEL);
        if (!wdt) {
                dev_warn(&adev->dev, "Kzalloc failed\n");
                ret = -ENOMEM;
-               goto err_kzalloc;
+               goto err;
+       }
+
+       wdt->base = devm_ioremap(&adev->dev, adev->res.start,
+                       resource_size(&adev->res));
+       if (!wdt->base) {
+               ret = -ENOMEM;
+               dev_warn(&adev->dev, "ioremap fail\n");
+               goto err;
        }
 
        wdt->clk = clk_get(&adev->dev, NULL);
        if (IS_ERR(wdt->clk)) {
                dev_warn(&adev->dev, "Clock not found\n");
                ret = PTR_ERR(wdt->clk);
-               goto err_clk_get;
-       }
-
-       wdt->base = ioremap(adev->res.start, resource_size(&adev->res));
-       if (!wdt->base) {
-               ret = -ENOMEM;
-               dev_warn(&adev->dev, "ioremap fail\n");
-               goto err_ioremap;
+               goto err;
        }
 
        wdt->adev = adev;
@@ -327,14 +328,7 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
        return 0;
 
 err_misc_register:
-       iounmap(wdt->base);
-err_ioremap:
        clk_put(wdt->clk);
-err_clk_get:
-       kfree(wdt);
-       wdt = NULL;
-err_kzalloc:
-       release_mem_region(adev->res.start, resource_size(&adev->res));
 err:
        dev_err(&adev->dev, "Probe Failed!!!\n");
        return ret;
@@ -343,10 +337,7 @@ err:
 static int __devexit sp805_wdt_remove(struct amba_device *adev)
 {
        misc_deregister(&sp805_wdt_miscdev);
-       iounmap(wdt->base);
        clk_put(wdt->clk);
-       kfree(wdt);
-       release_mem_region(adev->res.start, resource_size(&adev->res));
 
        return 0;
 }