linux-kernel - Re: [PATCH] spi: remove return value check of debugfs_create

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Date:   Mon, 24 Apr 2023 14:20:45 +0200
From:   Peter Enderborg <peter.enderborg@...y.com>
To:     Mark Brown <broonie@...nel.org>, Yingsha Xu <ysxu@...t.edu.cn>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Serge Semin <fancer.lancer@...il.com>, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] spi: remove return value check of debugfs_create_dir()

On 4/24/23 13:54, Mark Brown wrote:
> On Sun, Apr 23, 2023 at 02:11:54PM +0800, Yingsha Xu wrote:
>> Smatch complains that:
>> dw_spi_debugfs_init() warn: 'dws->debugfs' is an error pointer
>>  or valid
>>
>> Debugfs checks are generally not supposed to be checked for errors
>> and it is not necessary here.
>>
>> Just delete the dead code.
> 
> This is very much a question of taste with a range of use cases
> available.

No. 
https://lkml.iu.edu/hypermail/linux/kernel/1901.2/05993.html
We can do things with the debug information without filesystem enabled.