Wei Yongjun e00edb4efb
drivers: net: davinci_mdio: fix potential NULL dereference in davinci_mdio_probe() ...
platform_get_resource() may fail and return NULL, so we should
better check it's return value to avoid a NULL pointer dereference
since devm_ioremap() does not check input parameters for null.
This is detected by Coccinelle semantic patch.
@@
expression pdev, res, n, t, e, e1, e2;
@@
res = \(platform_get_resource\|platform_get_resource_byname\)(pdev, t, n);
+ if (!res)
+ return -EINVAL;
... when != res == NULL
e = devm_ioremap(e1, res->start, e2);
Fixes: 03f66f0675weiyongjun1@huawei.com >
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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