linux-kernel - Re: [PATCH] drm/amd/display: remove unused variable available

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Message-ID: <CADnq5_PtFqWKvVePq+jydpC06QG35q420-9iQErv6OcgYcPzJQ@mail.gmail.com>
Date:   Wed, 8 Mar 2023 10:40:46 -0500
From:   Alex Deucher <alexdeucher@...il.com>
To:     Tom Rix <trix@...hat.com>
Cc:     harry.wentland@....com, sunpeng.li@....com,
        Rodrigo.Siqueira@....com, alexander.deucher@....com,
        christian.koenig@....com, Xinhui.Pan@....com, airlied@...il.com,
        daniel@...ll.ch, wenjing.liu@....com, qingqing.zhuo@....com,
        Jun.Lei@....com, mghaddar@....com, candice.li@....com,
        aric.cyr@....com, dri-devel@...ts.freedesktop.org,
        amd-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/amd/display: remove unused variable available

Applied.  Thanks!

On Wed, Mar 8, 2023 at 9:11 AM Tom Rix <trix@...hat.com> wrote:
>
> With gcc and W=1, there is this error
> drivers/gpu/drm/amd/amdgpu/../display/dc/link/protocols/link_dp_dpia_bw.c:297:13: error:
>   variable ‘available’ set but not used [-Werror=unused-but-set-variable]
>   297 |         int available = 0;
>       |             ^~~~~~~~~
>
> Since available is unused, remove it.
>
> Signed-off-by: Tom Rix <trix@...hat.com>
> ---
>  .../drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c   | 8 --------
>  1 file changed, 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c
> index f14217cc16fd..2f0311c42f90 100644
> --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c
> +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_dpia_bw.c
> @@ -294,7 +294,6 @@ bool link_dp_dpia_set_dptx_usb4_bw_alloc_support(struct dc_link *link)
>  void dpia_handle_bw_alloc_response(struct dc_link *link, uint8_t bw, uint8_t result)
>  {
>         int bw_needed = 0;
> -       int available = 0;
>         int estimated = 0;
>         int host_router_total_estimated_bw = 0;
>
> @@ -373,20 +372,13 @@ void dpia_handle_bw_alloc_response(struct dc_link *link, uint8_t bw, uint8_t res
>
>                 // 1. If due to unplug of other sink
>                 if (estimated == host_router_total_estimated_bw) {
> -
>                         // First update the estimated & max_bw fields
>                         if (link->dpia_bw_alloc_config.estimated_bw < estimated) {
> -                               available = estimated - link->dpia_bw_alloc_config.estimated_bw;
>                                 link->dpia_bw_alloc_config.estimated_bw = estimated;
>                         }
>                 }
>                 // 2. If due to realloc bw btw 2 dpia due to plug OR realloc unused Bw
>                 else {
> -
> -                       // We took from another unplugged/problematic sink to give to us
> -                       if (link->dpia_bw_alloc_config.estimated_bw < estimated)
> -                               available = estimated - link->dpia_bw_alloc_config.estimated_bw;
> -
>                         // We lost estimated bw usually due to plug event of other dpia
>                         link->dpia_bw_alloc_config.estimated_bw = estimated;
>                 }
> --
> 2.27.0
>