linux-kernel - Re: [PATCH] drm/ttm: Remove duplicate assignments to ttm->caching

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Date:   Thu, 29 Jun 2023 08:37:38 +0200
From:   Christian König <christian.koenig@....com>
To:     Feng Jiang <jiangfeng@...inos.cn>, ray.huang@....com,
        airlied@...il.com, daniel@...ll.ch, michael.j.ruhl@...el.com
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/ttm: Remove duplicate assignments to ttm->caching

This has already been fixed with:

commit 2ce977df10c179138e2723b25c2d2c055a3e3cc6
Author: Ma Jun <Jun.Ma2@....com>
Date:   Wed May 31 13:30:51 2023 +0800

     drm/ttm: Remove redundant code in ttm_tt_init_fields

     Remove redundant assignment code for ttm->caching as it's overwritten
     just a few lines later.

     v2:
      - Update the commit message.

     Signed-off-by: Ma Jun <Jun.Ma2@....com>
     Reviewed-by: Guchun Chen <guchun.chen@....com>
     Reviewed-by: Christian König <christian.koenig@....com>
     Signed-off-by: Christian König <christian.koenig@....com>
     Link: 
https://patchwork.freedesktop.org/patch/msgid/20230531053051.3453509-1-Jun.Ma2@amd.com


Regards,
Christian.

Am 25.06.23 um 04:45 schrieb Feng Jiang:
> The parameter 'caching' has already been assigned to
> 'ttm->caching', so 'ttm_cached' is redundant.
>
> Fixes: 1b4ea4c5980f ("drm/ttm: set the tt caching state at creation time")
> Signed-off-by: Feng Jiang <jiangfeng@...inos.cn>
> ---
>   drivers/gpu/drm/ttm/ttm_tt.c | 1 -
>   1 file changed, 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
> index ab725d9d14a6..1ce4b36ab33b 100644
> --- a/drivers/gpu/drm/ttm/ttm_tt.c
> +++ b/drivers/gpu/drm/ttm/ttm_tt.c
> @@ -137,7 +137,6 @@ static void ttm_tt_init_fields(struct ttm_tt *ttm,
>   			       unsigned long extra_pages)
>   {
>   	ttm->num_pages = (PAGE_ALIGN(bo->base.size) >> PAGE_SHIFT) + extra_pages;
> -	ttm->caching = ttm_cached;
>   	ttm->page_flags = page_flags;
>   	ttm->dma_address = NULL;
>   	ttm->swap_storage = NULL;