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[Huang Rui]

On Wed, Apr 07, 2021 at 09:27:46AM +0800, songqiang wrote:

Please add the description in the commit message and subject.

Thanks,
Ray

> Signed-off-by: songqiang <songqiang at uniontech.com>
> ---
>  drivers/gpu/drm/ttm/ttm_page_alloc.c | 18 ++++++++++++++----
>  1 file changed, 14 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> index 14660f723f71..f3698f0ad4d7 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> @@ -736,8 +736,16 @@ static void ttm_put_pages(struct page **pages, unsigned npages, int flags,
>  					if (++p != pages[i + j])
>  					    break;
>  
> -				if (j == HPAGE_PMD_NR)
> +				if (j == HPAGE_PMD_NR) {
>  					order = HPAGE_PMD_ORDER;
> +					for (j = 1; j < HPAGE_PMD_NR; ++j)
> +						page_ref_dec(pages[i+j]);
> +				}
>  			}
>  #endif
>  
> @@ -868,10 +876,12 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
>  				p = alloc_pages(huge_flags, HPAGE_PMD_ORDER);
>  				if (!p)
>  					break;
> -
> -				for (j = 0; j < HPAGE_PMD_NR; ++j)
> +				for (j = 0; j < HPAGE_PMD_NR; ++j) {
>  					pages[i++] = p++;
> -
> +					if (j > 0)
> +						page_ref_inc(pages[i-1]);
> +				}
>  				npages -= HPAGE_PMD_NR;
>  			}
>  		}
> 
> 
> 
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