linux-kernel - Re: [PATCH 2/3] lib/notifier-error-inject: fix error when writing -errno to debugfs file

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Date:   Tue, 20 Sep 2022 10:15:20 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Akinobu Mita <akinobu.mita@...il.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        corbet@....net, osalvador@...e.de, shuah@...nel.org,
        Zhao Gongyi <zhaogongyi@...wei.com>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        Yicong Yang <yangyicong@...ilicon.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        akpm@...ux-foundation.org
Subject: Re: [PATCH 2/3] lib/notifier-error-inject: fix error when writing
 -errno to debugfs file

On 19.09.22 19:24, Akinobu Mita wrote:
> The simple attribute files do not accept a negative value since the
> commit 488dac0c9237 ("libfs: fix error cast of negative value in
> simple_attr_write()").
> 
> This restores the previous behaviour by using newly introduced
> DEFINE_SIMPLE_ATTRIBUTE_SIGNED instead of DEFINE_SIMPLE_ATTRIBUTE.
> 
> Fixes: 488dac0c9237 ("libfs: fix error cast of negative value in simple_attr_write()")
> Reported-by: Zhao Gongyi <zhaogongyi@...wei.com>
> Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>
> ---
>   lib/notifier-error-inject.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/notifier-error-inject.c b/lib/notifier-error-inject.c
> index 21016b32d313..2b24ea6c9497 100644
> --- a/lib/notifier-error-inject.c
> +++ b/lib/notifier-error-inject.c
> @@ -15,7 +15,7 @@ static int debugfs_errno_get(void *data, u64 *val)
>   	return 0;
>   }
>   
> -DEFINE_SIMPLE_ATTRIBUTE(fops_errno, debugfs_errno_get, debugfs_errno_set,
> +DEFINE_SIMPLE_ATTRIBUTE_SIGNED(fops_errno, debugfs_errno_get, debugfs_errno_set,
>   			"%lld\n");
>   
>   static struct dentry *debugfs_create_errno(const char *name, umode_t mode,

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 
Thanks,

David / dhildenb