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
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -285,32 +285,33 @@
{
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 @@
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 @@
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;
}