linux-kernel - Re: [PATCH] drivers: ras: cec: return value check of `d`

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Message-ID: <20230423125657.GCZEUrGT7uhqNHTaLm@fat_crate.local>
Date:   Sun, 23 Apr 2023 14:56:57 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Ruliang Lin <u202112092@...t.edu.cn>
Cc:     Tony Luck <tony.luck@...el.com>, Ingo Molnar <mingo@...nel.org>,
        hust-os-kernel-patches@...glegroups.com,
        Dongliang Mu <dzm91@...t.edu.cn>, linux-edac@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers: ras: cec: return value check of `d`

On Sun, Apr 23, 2023 at 08:29:32PM +0800, Ruliang Lin wrote:
> According to the documentation of the debugfs_create_dir() function, 
> there is no need to check the return value of this function.

" * Drivers should generally work fine even if debugfs fails to init anyway."

Except that this particular driver won't if there is no debugfs
hierarchy created.

> Just delete the dead code.

So no, in this case it is not dead code but very much alive.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette