[PATCH] drm/amd/display: should check error using DC_OK

[Alex Deucher]

On Mon, Aug 17, 2020 at 3:08 AM Tong Zhang <ztong0001 at gmail.com> wrote:
>
> core_link_read_dpcd returns only DC_OK(1) and DC_ERROR_UNEXPECTED(-1),
> the caller should check error using DC_OK instead of checking against 0
>
> Signed-off-by: Tong Zhang <ztong0001 at gmail.com>

Applied.  Thanks!

Alex

> ---
>  drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> index 5cb7b834e459..a60a457fcc8f 100644
> --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
> @@ -4376,9 +4376,9 @@ bool dc_link_get_backlight_level_nits(struct dc_link *link,
>                         link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
>                 return false;
>
> -       if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_CURRENT_PEAK,
> +       if (core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_CURRENT_PEAK,
>                         dpcd_backlight_get.raw,
> -                       sizeof(union dpcd_source_backlight_get)))
> +                       sizeof(union dpcd_source_backlight_get)) != DC_OK)
>                 return false;
>
>         *backlight_millinits_avg =
> @@ -4417,9 +4417,9 @@ bool dc_link_read_default_bl_aux(struct dc_link *link, uint32_t *backlight_milli
>                 link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
>                 return false;
>
> -       if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL,
> +       if (core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL,
>                 (uint8_t *) backlight_millinits,
> -               sizeof(uint32_t)))
> +               sizeof(uint32_t)) != DC_OK)
>                 return false;
>
>         return true;
> --
> 2.25.1
>
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