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watchdog: qcom: Check for platform_get_resource() failure
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>
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@ -162,6 +162,8 @@ static int qcom_wdt_probe(struct platform_device *pdev)
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return -ENOMEM;
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -ENOMEM;
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/* We use CPU0's DGT for the watchdog */
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/* We use CPU0's DGT for the watchdog */
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if (of_property_read_u32(np, "cpu-offset", &percpu_offset))
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if (of_property_read_u32(np, "cpu-offset", &percpu_offset))
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