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authorViresh Kumar <viresh.kumar@st.com>2012-03-12 09:51:59 +0530
committerWim Van Sebroeck <wim@iguana.be>2012-03-27 20:14:15 +0200
commit75f5a536c0b605b9b8406325f51f62f67141973e (patch)
tree657168af4ffe1dbe0aee01903e8e2079567cc4e7 /drivers/watchdog
parentaa065770f55f44ed24f0a9b76ec6e2135264d43b (diff)
watchdog: mpcore_wdt: Use devm routines
mpcore_wdt driver currently uses normal kzalloc, request_irq, 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. Also, request_irq is moved before registering misc device, so that we are ready for irq as soon as device is registered. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/mpcore_wdt.c58
1 files changed, 19 insertions, 39 deletions
diff --git a/drivers/watchdog/mpcore_wdt.c b/drivers/watchdog/mpcore_wdt.c
index ca0810ed00a..2d8c0a006b8 100644
--- a/drivers/watchdog/mpcore_wdt.c
+++ b/drivers/watchdog/mpcore_wdt.c
@@ -338,43 +338,37 @@ static int __devinit mpcore_wdt_probe(struct platform_device *pdev)
return -ENODEV;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- ret = -ENODEV;
- goto err_out;
- }
+ if (!res)
+ return -ENODEV;
- wdt = kzalloc(sizeof(struct mpcore_wdt), GFP_KERNEL);
- if (!wdt) {
- ret = -ENOMEM;
- goto err_out;
- }
+ wdt = devm_kzalloc(&pdev->dev, sizeof(struct mpcore_wdt), GFP_KERNEL);
+ if (!wdt)
+ return -ENOMEM;
wdt->dev = &pdev->dev;
wdt->irq = platform_get_irq(pdev, 0);
- if (wdt->irq < 0) {
- ret = -ENXIO;
- goto err_free;
- }
- wdt->base = ioremap(res->start, resource_size(res));
- if (!wdt->base) {
- ret = -ENOMEM;
- goto err_free;
+ if (wdt->irq < 0)
+ return -ENXIO;
+
+ ret = devm_request_irq(wdt->dev, wdt->irq, mpcore_wdt_fire, 0,
+ "mpcore_wdt", wdt);
+ if (ret) {
+ dev_printk(KERN_ERR, wdt->dev,
+ "cannot register IRQ%d for watchdog\n", wdt->irq);
+ return ret;
}
+ wdt->base = devm_ioremap(wdt->dev, res->start, resource_size(res));
+ if (!wdt->base)
+ return -ENOMEM;
+
mpcore_wdt_miscdev.parent = &pdev->dev;
ret = misc_register(&mpcore_wdt_miscdev);
if (ret) {
dev_printk(KERN_ERR, wdt->dev,
"cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
- goto err_misc;
- }
-
- ret = request_irq(wdt->irq, mpcore_wdt_fire, 0, "mpcore_wdt", wdt);
- if (ret) {
- dev_printk(KERN_ERR, wdt->dev,
- "cannot register IRQ%d for watchdog\n", wdt->irq);
- goto err_irq;
+ return ret;
}
mpcore_wdt_stop(wdt);
@@ -382,30 +376,16 @@ static int __devinit mpcore_wdt_probe(struct platform_device *pdev)
mpcore_wdt_pdev = pdev;
return 0;
-
-err_irq:
- misc_deregister(&mpcore_wdt_miscdev);
-err_misc:
- iounmap(wdt->base);
-err_free:
- kfree(wdt);
-err_out:
- return ret;
}
static int __devexit mpcore_wdt_remove(struct platform_device *pdev)
{
- struct mpcore_wdt *wdt = platform_get_drvdata(pdev);
-
platform_set_drvdata(pdev, NULL);
misc_deregister(&mpcore_wdt_miscdev);
mpcore_wdt_pdev = NULL;
- free_irq(wdt->irq, wdt);
- iounmap(wdt->base);
- kfree(wdt);
return 0;
}