[PATCH 2/2] drm/ttm: fix start page for huge page check in ttm_put_pages()

[Huang, Ray]

> -----Original Message-----
> From: Christian König [mailto:ckoenig.leichtzumerken at gmail.com]
> Sent: Monday, April 08, 2019 9:13 PM
> To: Zhang, Jerry <Jerry.Zhang at amd.com>; Huang, Ray
> <Ray.Huang at amd.com>; amd-gfx at lists.freedesktop.org; dri-
> devel at lists.freedesktop.org
> Subject: [PATCH 2/2] drm/ttm: fix start page for huge page check in
> ttm_put_pages()
> 
> The first page entry is always the same with itself.
> 
> Signed-off-by: Christian König <christian.koenig at amd.com>

Reviewed-by: Huang Rui <ray.huang at amd.com>

> ---
>  drivers/gpu/drm/ttm/ttm_page_alloc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c
> b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> index f77c81db161b..c74147f0cbe3 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> @@ -732,7 +732,7 @@ static void ttm_put_pages(struct page **pages,
> unsigned npages, int flags,  #ifdef CONFIG_TRANSPARENT_HUGEPAGE
>  			if (!(flags & TTM_PAGE_FLAG_DMA32) &&
>  			    (npages - i) >= HPAGE_PMD_NR) {
> -				for (j = 0; j < HPAGE_PMD_NR; ++j)
> +				for (j = 1; j < HPAGE_PMD_NR; ++j)
>  					if (p++ != pages[i + j])
>  					    break;
> 
> @@ -767,7 +767,7 @@ static void ttm_put_pages(struct page **pages,
> unsigned npages, int flags,
>  			if (!p)
>  				break;
> 
> -			for (j = 0; j < HPAGE_PMD_NR; ++j)
> +			for (j = 1; j < HPAGE_PMD_NR; ++j)
>  				if (p++ != pages[i + j])
>  				    break;
> 
> --
> 2.17.1