On 8/7/19 3:33 AM, john.hubb...@gmail.com wrote:
> From: John Hubbard <jhubb...@nvidia.com>
>
> For pages that were retained via get_user_pages*(), release those pages
> via the new put_user_page*() routines, instead of via put_page() or
> release_pages().
>
> This is part a tree-wide conversion, as described in commit fc1d8e7cca2d
> ("mm: introduce put_user_page*(), placeholder versions").
>
> Cc: Mauro Carvalho Chehab <mche...@kernel.org>
> Cc: Kees Cook <keesc...@chromium.org>
> Cc: Hans Verkuil <hans.verk...@cisco.com>
> Cc: Sakari Ailus <sakari.ai...@linux.intel.com>
> Cc: Jan Kara <j...@suse.cz>
> Cc: Robin Murphy <robin.mur...@arm.com>
> Cc: Souptick Joarder <jrdr.li...@gmail.com>
> Cc: Dan Williams <dan.j.willi...@intel.com>
> Cc: linux-me...@vger.kernel.org
> Signed-off-by: John Hubbard <jhubb...@nvidia.com>
Acked-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
> ---
> drivers/media/v4l2-core/videobuf-dma-sg.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c
> b/drivers/media/v4l2-core/videobuf-dma-sg.c
> index 66a6c6c236a7..d6eeb437ec19 100644
> --- a/drivers/media/v4l2-core/videobuf-dma-sg.c
> +++ b/drivers/media/v4l2-core/videobuf-dma-sg.c
> @@ -349,8 +349,7 @@ int videobuf_dma_free(struct videobuf_dmabuf *dma)
> BUG_ON(dma->sglen);
>
> if (dma->pages) {
> - for (i = 0; i < dma->nr_pages; i++)
> - put_page(dma->pages[i]);
> + put_user_pages(dma->pages, dma->nr_pages);
> kfree(dma->pages);
> dma->pages = NULL;
> }
>
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