[PATCH] nvme: Fix missing error code in nvme_configure_directives()

[Keith Busch]

On Thu, Sep 09, 2021 at 05:50:21PM +0800, Jiapeng Chong wrote:
> From: chongjiapeng <jiapeng.chong at linux.alibaba.com>
> 
> The error code is missing in this code scenario, add the error code
> '-EINVAL' to the return value 'ret'.
> 
> Eliminate the follow smatch warning:
> 
> drivers/nvme/host/core.c:786 nvme_configure_directives() warn: missing
> error code 'ret'.

Nak, the code is correct as-is. Returning a negative error for this
harmless condition will result in disabling the controller when we can
proceed just fine without directives.