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From: Brian Norris <briannorris@chromium.org>
To: Guenter Roeck <linux@roeck-us.net>
Cc: "Enric Balletbo i Serra" <enric.balletbo@collabora.com>,
	"Jonathan Cameron" <jic23@kernel.org>,
	"Benson Leung" <bleung@chromium.org>,
	"Dmitry Torokhov" <dmitry.torokhov@gmail.com>,
	"Thierry Reding" <thierry.reding@gmail.com>,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Gwendal Grignou" <gwendal@chromium.org>,
	linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-input@vger.kernel.org, linux-pwm@vger.kernel.org
Subject: Re: [PATCH v3 0/6] platform/chrome: cros_ec_proto: Convert EC error codes to Linux error codes
Date: Wed, 29 Jul 2020 15:27:57 -0700
Message-ID: <20200729222757.GB970863@google.com> (raw)
In-Reply-To: <20200726220101.29059-1-linux@roeck-us.net>

On Sun, Jul 26, 2020 at 03:00:55PM -0700, Guenter Roeck wrote:
> The EC reports a variety of error codes. Most of those, with the exception
> of EC_RES_INVALID_VERSION, are converted to -EPROTO. As result, the actual
> error code gets lost. In cros_ec_cmd_xfer_status(), convert all EC errors
> to Linux error codes to report a more meaningful error to the caller to aid
> debugging.
> 
> To prepare for this change, handle error codes other than -EPROTO for all
> callers of cros_ec_cmd_xfer_status(). Specifically, no longer assume that
> -EPROTO reflects an error from the EC and all other error codes reflect a
> transfer error.
> 
> v2: Add patches 1/4 to 3/4 to handle callers of cros_ec_cmd_xfer_status()
> v3: Add patches 4/6 and 5/6 to handle additional callers of
> 	cros_ec_cmd_xfer_status()
>     Use -ENOPROTOOPT for EC_RES_INVALID_VERSION
>     Implement function to convert error codes

A small potential (i.e., being paranoid about future changes) note on
patch 6, but otherwise looks fine to me:

Reviewed-by: Brian Norris <briannorris@chromium.org>

      parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-26 22:00 Guenter Roeck
2020-07-26 22:00 ` [PATCH v3 1/6] iio: cros_ec: Accept -EOPNOTSUPP as 'not supported' error code Guenter Roeck
2020-07-26 22:00 ` [PATCH v3 2/6] cros_ec_lightbar: Accept more error codes from cros_ec_cmd_xfer_status Guenter Roeck
2020-07-26 22:00 ` [PATCH v3 3/6] platform/chrome: cros_ec_sysfs: Report range of error codes from EC Guenter Roeck
2020-07-26 22:00 ` [PATCH v3 4/6] pwm: cros-ec: Accept more error codes from cros_ec_cmd_xfer_status Guenter Roeck
2020-07-27  8:35   ` Thierry Reding
2020-08-01  7:21   ` Uwe Kleine-König
2020-08-01 16:32     ` Guenter Roeck
2020-08-02 20:27       ` Uwe Kleine-König
2020-07-26 22:01 ` [PATCH v3 5/6] platform/input: cros_ec: Replace -ENOTSUPP with -ENOPROTOOPT Guenter Roeck
2020-07-30  4:53   ` Dmitry Torokhov
2020-07-26 22:01 ` [PATCH v3 6/6] platform/chrome: cros_ec_proto: Convert EC error codes to Linux error codes Guenter Roeck
2020-07-29 22:21   ` Brian Norris
2020-07-29 23:22     ` Guenter Roeck
2020-07-29 23:29       ` Brian Norris
2020-07-29 22:27 ` Brian Norris [this message]

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