watchdog: wdat_wdt: fix return value check in wdat_wdt_probe()
In case of error, the function devm_ioremap_resource() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c
index 6b64645..4594723 100644
--- a/drivers/watchdog/wdat_wdt.c
+++ b/drivers/watchdog/wdat_wdt.c
@@ -351,16 +351,17 @@
res = &pdev->resource[i];
if (resource_type(res) == IORESOURCE_MEM) {
reg = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(reg))
+ return PTR_ERR(reg);
} else if (resource_type(res) == IORESOURCE_IO) {
reg = devm_ioport_map(&pdev->dev, res->start, 1);
+ if (!reg)
+ return -ENOMEM;
} else {
dev_err(&pdev->dev, "Unsupported resource\n");
return -EINVAL;
}
- if (!reg)
- return -ENOMEM;
-
regs[i] = reg;
}