linux-kernel - Re: [PATCH v2] drm/stm: check pitch and size calculations even if !CONFIG

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Date:   Fri, 23 Feb 2018 08:33:50 +0000
From:   Philippe CORNU <philippe.cornu@...com>
To:     Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Yannick FERTRE <yannick.fertre@...com>,
        Vincent ABRIOU <vincent.abriou@...com>,
        "laurent.pinchart@...asonboard.com" 
        <laurent.pinchart@...asonboard.com>
CC:     "airlied@...ux.ie" <airlied@...ux.ie>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] drm/stm: check pitch and size calculations even if
 !CONFIG_MMU

Hi Benjamin,

On 01/31/2018 09:05 AM, Benjamin Gaignard wrote:
> In all cases we have to check pitch and size calculations to speed up
> data transfer.
> 
> Fixes: 21f815bf773c ("drm/stm: drv: Improve data transfers")
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...aro.org>
> ---
>   drivers/gpu/drm/stm/drv.c | 2 --
>   1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c
> index 8bc7e8418b8d..9ab00a87f7cc 100644
> --- a/drivers/gpu/drm/stm/drv.c
> +++ b/drivers/gpu/drm/stm/drv.c
> @@ -35,7 +35,6 @@ static int stm_gem_cma_dumb_create(struct drm_file *file,
>   				   struct drm_device *dev,
>   				   struct drm_mode_create_dumb *args)
>   {
> -#ifdef CONFIG_MMU
>   	unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
>   
>   	/*
> @@ -44,7 +43,6 @@ static int stm_gem_cma_dumb_create(struct drm_file *file,
>   	 */
>   	args->pitch = roundup(min_pitch, 128);
>   	args->height = roundup(args->height, 4);
> -#endif

Reviewed-by: Philippe Cornu <philippe.cornu@...com>

Many thanks,
Philippe :-)

>   
>   	return drm_gem_cma_dumb_create_internal(file, dev, args);
>   }
>