Re: [v3] net: ethernet: cavium: octeon: octeon_mgmt: Handle return NULL error from devm_ioremap

[David Miller]

From: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
Date: Thu, 15 Dec 2016 00:33:30 +0530

> Here, If devm_ioremap will fail. It will return NULL.
> Kernel can run into a NULL-pointer dereference.
> This error check will avoid NULL pointer dereference.
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>

Since ioremap() is in fact designed to possibly fail, we do
need to always check it's return value.  So this change is
correct and I have applied it to the 'net' tree.

Thanks.