linux-kernel - Re: [PATCH] ASoC: cros_ec_codec: Log results when EC commands fail

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Message-ID: <CABXOdTezM+N+kO=BYTggfDvCyqBtQzYzVEZtrd183VUYP6KwKA@mail.gmail.com>
Date:   Thu, 2 Jul 2020 22:33:46 -0700
From:   Guenter Roeck <groeck@...gle.com>
To:     Yu-Hsuan Hsu <yuhsuan@...omium.org>
Cc:     linux-kernel <linux-kernel@...r.kernel.org>,
        Tzung-Bi Shih <tzungbi@...gle.com>,
        Cheng-Yi Chiang <cychiang@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Guenter Roeck <groeck@...omium.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Benson Leung <bleung@...omium.org>, alsa-devel@...a-project.org
Subject: Re: [PATCH] ASoC: cros_ec_codec: Log results when EC commands fail

On Thu, Jul 2, 2020 at 8:30 PM Yu-Hsuan Hsu <yuhsuan@...omium.org> wrote:
>
> Log results of failed EC commands to identify a problem more easily.
>
> Signed-off-by: Yu-Hsuan Hsu <yuhsuan@...omium.org>
> ---
>  sound/soc/codecs/cros_ec_codec.c | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
> index 8d45c628e988e..a4ab62f59efa6 100644
> --- a/sound/soc/codecs/cros_ec_codec.c
> +++ b/sound/soc/codecs/cros_ec_codec.c
> @@ -90,10 +90,17 @@ static int send_ec_host_command(struct cros_ec_device *ec_dev, uint32_t cmd,
>         if (outsize)
>                 memcpy(msg->data, out, outsize);
>
> -       ret = cros_ec_cmd_xfer_status(ec_dev, msg);
> +       ret = cros_ec_cmd_xfer(ec_dev, msg);

This change isn't explained in the description.

Guenter

>         if (ret < 0)
>                 goto error;
>
> +       if (msg->result != EC_RES_SUCCESS) {
> +               dev_err(ec_dev->dev, "Command %d failed: %d\n", cmd,
> +                       msg->result);
> +               ret = -EPROTO;
> +               goto error;
> +       }
> +
>         if (insize)
>                 memcpy(in, msg->data, insize);
>
> --
> 2.27.0.212.ge8ba1cc988-goog
>