linux-kernel - Re: [PATCH] RDMA: remove null check after call container

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Message-ID: <20220517121646.GE63055@ziepe.ca>
Date:   Tue, 17 May 2022 09:16:46 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Haowen Bai <baihaowen@...zu.com>
Cc:     Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
        Leon Romanovsky <leon@...nel.org>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] RDMA: remove null check after call container_of()

On Tue, May 17, 2022 at 09:33:28AM +0800, Haowen Bai wrote:
> container_of() will never return NULL, so remove useless code.

It is confusing here, but it can be null. If you want to do this then
you have to split out the _ib_alloc_device call and check it
seperately.

Jason