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watchdog: qcom: Check for platform_get_resource() failure

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platform_get_resource() may fail, so we should better check its
return value and propagate an error in case it fails.

This avoids a NULL pointer dereference a bit later in the code.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Fabio Estevam 2017-07-22 13:04:33 -03:00 committed by Wim Van Sebroeck
parent 6f671c6b62
commit 15210ad18f
1 changed files with 2 additions and 0 deletions
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2
drivers/watchdog/qcom-wdt.c
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@ -162,6 +162,8 @@ static int qcom_wdt_probe(struct platform_device *pdev)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENOMEM;
/* We use CPU0's DGT for the watchdog */
if (of_property_read_u32(np, "cpu-offset", &percpu_offset))