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authorWei Yongjun <weiyongjun1@huawei.com>2016-09-28 23:15:54 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-09-28 23:15:54 +0200
commit356ed043517dbceb646a9353831abde91062a395 (patch)
tree0bc4785cf97f7a1e99b9efa55ea77181efa136c0 /drivers
parentbba6529ea039925ed422696be5d52677bd16643c (diff)
downloadlinux-356ed043517dbceb646a9353831abde91062a395.tar.bz2
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/watchdog/wdat_wdt.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/watchdog/wdat_wdt.c b/drivers/watchdog/wdat_wdt.c
index 6b6464596674..4594723c27ba 100644
--- a/drivers/watchdog/wdat_wdt.c
+++ b/drivers/watchdog/wdat_wdt.c
@@ -351,16 +351,17 @@ static int wdat_wdt_probe(struct platform_device *pdev)
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;
}