linux-kernel - Re: [PATCH v2 1/5] drm/etnaviv: Use unsigned type to count the number of pages

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Message-ID: <0eb75d1a3d0da6ec4d520da9ba2061dcf69dadff.camel@pengutronix.de>
Date: Mon, 28 Oct 2024 16:54:50 +0100
From: Lucas Stach <l.stach@...gutronix.de>
To: Sui Jingfeng <sui.jingfeng@...ux.dev>
Cc: Christian Gmeiner <christian.gmeiner@...il.com>, Russell King
 <linux+etnaviv@...linux.org.uk>, David Airlie <airlied@...il.com>, Daniel
 Vetter <daniel@...ll.ch>, Thomas Zimmermann <tzimmermann@...e.de>, Maxime
 Ripard <mripard@...nel.org>, dri-devel@...ts.freedesktop.org, 
 etnaviv@...ts.freedesktop.org, linux-kernel@...r.kernel.org, Christian
 Gmeiner <cgmeiner@...lia.com>
Subject: Re: [PATCH v2 1/5] drm/etnaviv: Use unsigned type to count the
 number of pages

Am Sonntag, dem 08.09.2024 um 20:11 +0800 schrieb Sui Jingfeng:
> The drm_prime_pages_to_sg() function takes an 'unsigned int' argument to
> store the length of the page vector. The size of the object in number of
> CPU pages can not be negative, hence, use 'unsigned' variable to store
> the number of pages, instead of the 'signed' one.
> 
> Reviewed-by: Christian Gmeiner <cgmeiner@...lia.com>
> Signed-off-by: Sui Jingfeng <sui.jingfeng@...ux.dev>

Thanks, series applied to etnaviv/next.

> ---
> 
> v2: Pick up tags and improve commit message
> 
>  drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
> index 3524b5811682..6b98200068e4 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c
> @@ -17,7 +17,7 @@ static struct lock_class_key etnaviv_prime_lock_class;
>  struct sg_table *etnaviv_gem_prime_get_sg_table(struct drm_gem_object *obj)
>  {
>  	struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
> -	int npages = obj->size >> PAGE_SHIFT;
> +	unsigned int npages = obj->size >> PAGE_SHIFT;
>  
>  	if (WARN_ON(!etnaviv_obj->pages))  /* should have already pinned! */
>  		return ERR_PTR(-EINVAL);