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net: w5100: check return value after calling platform_get_resource()
It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1047,6 +1047,8 @@ static int w5100_mmio_probe(struct platform_device *pdev)
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mac_addr = data->mac_addr;
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!mem)
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return -EINVAL;
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if (resource_size(mem) < W5100_BUS_DIRECT_SIZE)
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ops = &w5100_mmio_indirect_ops;
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else
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