linux-kernel - Re: [PATCH] IB: mlx5: no need to check return value of debugfs

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Message-ID: <20191104205914.GI30938@ziepe.ca>
Date:   Mon, 4 Nov 2019 16:59:14 -0400
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Leon Romanovsky <leon@...nel.org>,
        Doug Ledford <dledford@...hat.com>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] IB: mlx5: no need to check return value of
 debugfs_create functions

On Mon, Nov 04, 2019 at 08:41:41AM +0100, Greg Kroah-Hartman wrote:
> When calling debugfs functions, there is no need to ever check the
> return value.  The function can work or not, but the code logic should
> never do something different based on this.
> 
> Cc: Leon Romanovsky <leon@...nel.org>
> Cc: Doug Ledford <dledford@...hat.com>
> Cc: Jason Gunthorpe <jgg@...pe.ca>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>  drivers/infiniband/hw/mlx5/main.c    | 62 +++++++---------------------
>  drivers/infiniband/hw/mlx5/mlx5_ib.h |  9 +---
>  2 files changed, 16 insertions(+), 55 deletions(-)
> 
> Note, I kind of need to take this through my tree now as I broke the
> build due to me changing the use of debugfs_create_atomic_t() in my
> tree and not noticing this being used here.  Sorry about that, any
> objections?

I think it is fine, I don't forsee conflicts here at this point.

To be clear, the build is broken in your tree and in linux-next?

> And 0-day seems really broken to have missed this for the past months,
> ugh, I need to stop relying on it...

Yes, I've noticed it missing a lot of stuff now too. Not sure why

Jason