linux-kernel - Re: [PATCH 3/4] cdx: create sysfs resource files

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Date:   Tue, 11 Jul 2023 16:00:37 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Abhijit Gangurde <abhijit.gangurde@....com>
Cc:     linux-kernel@...r.kernel.org, Nipun.Gupta@....com,
        nikhil.agarwal@....com, puneet.gupta@....com, git@....com,
        michal.simek@....com,
        Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@....com>
Subject: Re: [PATCH 3/4] cdx: create sysfs resource files

On Tue, Jul 11, 2023 at 05:40:26PM +0530, Abhijit Gangurde wrote:
> Resource files provides the basic MMIO regions info to the
> user-space. Also, resources<x> devices can be used to mmap the
> MMIO regions in the user-space.
> 
> Co-developed-by: Puneet Gupta <puneet.gupta@....com>
> Signed-off-by: Puneet Gupta <puneet.gupta@....com>
> Co-developed-by: Nipun Gupta <nipun.gupta@....com>
> Signed-off-by: Nipun Gupta <nipun.gupta@....com>
> Signed-off-by: Abhijit Gangurde <abhijit.gangurde@....com>
> Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@....com>
> Tested-by: Nikhil Agarwal <nikhil.agarwal@....com>
> ---
>  Documentation/ABI/testing/sysfs-bus-cdx |  15 +++
>  drivers/cdx/cdx.c                       | 139 +++++++++++++++++++++++-
>  include/linux/cdx/cdx_bus.h             |  10 ++
>  3 files changed, 163 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-cdx b/Documentation/ABI/testing/sysfs-bus-cdx
> index d9e00058471d..6ca47b6442ce 100644
> --- a/Documentation/ABI/testing/sysfs-bus-cdx
> +++ b/Documentation/ABI/testing/sysfs-bus-cdx
> @@ -76,3 +76,18 @@ Description:
>  		For example::
>  
>  		  # echo 1 > /sys/bus/cdx/devices/.../remove
> +
> +What:		/sys/bus/cdx/devices/.../resource
> +Date:		July 2023
> +Contact:	puneet.gupta@....com
> +Description:
> +		The resource file contains host addresses of CDX device
> +		resources. Each line of the resource file describes a region
> +		with start, end, and flag fields.

If you documented what this file looked like here, it would be obvious
that this is not an acceptable sysfs file in any sense of the word.

Please do so, and then fix the patch to not do that at all.

thanks,

greg k-h