linux-kernel - Re: [RESEND PATCH 09/11] platform/chrome: cros_ec_proto: return standard error codes for EC errors

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Date:   Thu, 14 Jul 2022 03:41:53 +0000
From:   Tzung-Bi Shih <tzungbi@...nel.org>
To:     Guenter Roeck <groeck@...gle.com>
Cc:     Benson Leung <bleung@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        "open list:CHROME HARDWARE PLATFORM SUPPORT" 
        <chrome-platform@...ts.linux.dev>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH 09/11] platform/chrome: cros_ec_proto: return
 standard error codes for EC errors

On Wed, Jul 13, 2022 at 11:23:58AM -0700, Guenter Roeck wrote:
> On Mon, Jun 27, 2022 at 7:49 PM Tzung-Bi Shih <tzungbi@...nel.org> wrote:
> >
> > cros_ec_wait_until_complete() checks `msg->result` for
> > EC_CMD_GET_COMMS_STATUS.  However, it doesn't return standard error codes
> > like most of others.
> 
> The callers of cros_ec_send_command() do the mapping. I am not sure if
> it is a good idea to change that; it may have undesired side effects
> (such as changing the userspace ABI) for callers of
> cros_ec_send_command() not expecting this change. It would also result
> in double mapping in some situations.

Agreed.  Let's drop the change.