linux-kernel - Re: [PATCH 2/2] platform/chrome: cros_kunit_util: add default value for `msg->result`

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Date:   Wed, 20 Jul 2022 06:02:26 -0700
From:   Guenter Roeck <groeck@...gle.com>
To:     Tzung-Bi Shih <tzungbi@...nel.org>
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: [PATCH 2/2] platform/chrome: cros_kunit_util: add default value
 for `msg->result`

On Tue, Jul 19, 2022 at 9:48 PM Tzung-Bi Shih <tzungbi@...nel.org> wrote:
>
> Add default value for `msg->result` so that it won't be garbage bytes
> when the mock list is empty.
>
> Signed-off-by: Tzung-Bi Shih <tzungbi@...nel.org>

Reviewed-by: Guenter Roeck <groeck@...omium.org>

> ---
>  drivers/platform/chrome/cros_kunit_util.c | 6 +++++-
>  drivers/platform/chrome/cros_kunit_util.h | 1 +
>  2 files changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/platform/chrome/cros_kunit_util.c b/drivers/platform/chrome/cros_kunit_util.c
> index 090927d43035..f0fda96b11bd 100644
> --- a/drivers/platform/chrome/cros_kunit_util.c
> +++ b/drivers/platform/chrome/cros_kunit_util.c
> @@ -13,6 +13,7 @@
>  #include "cros_ec.h"
>  #include "cros_kunit_util.h"
>
> +int cros_kunit_ec_xfer_mock_default_result;
>  int cros_kunit_ec_xfer_mock_default_ret;
>  int cros_kunit_ec_cmd_xfer_mock_called;
>  int cros_kunit_ec_pkt_xfer_mock_called;
> @@ -25,8 +26,10 @@ int cros_kunit_ec_xfer_mock(struct cros_ec_device *ec_dev, struct cros_ec_comman
>         struct ec_xfer_mock *mock;
>
>         mock = list_first_entry_or_null(&cros_kunit_ec_xfer_mock_in, struct ec_xfer_mock, list);
> -       if (!mock)
> +       if (!mock) {
> +               msg->result = cros_kunit_ec_xfer_mock_default_result;
>                 return cros_kunit_ec_xfer_mock_default_ret;
> +       }
>
>         list_del(&mock->list);
>
> @@ -112,6 +115,7 @@ int cros_kunit_readmem_mock(struct cros_ec_device *ec_dev, unsigned int offset,
>
>  void cros_kunit_mock_reset(void)
>  {
> +       cros_kunit_ec_xfer_mock_default_result = 0;
>         cros_kunit_ec_xfer_mock_default_ret = 0;
>         cros_kunit_ec_cmd_xfer_mock_called = 0;
>         cros_kunit_ec_pkt_xfer_mock_called = 0;
> diff --git a/drivers/platform/chrome/cros_kunit_util.h b/drivers/platform/chrome/cros_kunit_util.h
> index 88134c9f1acf..414002271c9c 100644
> --- a/drivers/platform/chrome/cros_kunit_util.h
> +++ b/drivers/platform/chrome/cros_kunit_util.h
> @@ -23,6 +23,7 @@ struct ec_xfer_mock {
>         u32 o_data_len;
>  };
>
> +extern int cros_kunit_ec_xfer_mock_default_result;
>  extern int cros_kunit_ec_xfer_mock_default_ret;
>  extern int cros_kunit_ec_cmd_xfer_mock_called;
>  extern int cros_kunit_ec_pkt_xfer_mock_called;
> --
> 2.37.0.170.g444d1eabd0-goog
>