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    Subject[PATCH v7 02/17] drm/exynos: Use FOLL_LONGTERM for g2d cmdlists
    Date
    The exynos g2d interface is very unusual, but it looks like the
    userptr objects are persistent. Hence they need FOLL_LONGTERM.

    Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
    Cc: Jason Gunthorpe <jgg@ziepe.ca>
    Cc: Inki Dae <inki.dae@samsung.com>
    Cc: Joonyoung Shim <jy0922.shim@samsung.com>
    Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
    Cc: Kyungmin Park <kyungmin.park@samsung.com>
    Cc: Kukjin Kim <kgene@kernel.org>
    Cc: Krzysztof Kozlowski <krzk@kernel.org>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: John Hubbard <jhubbard@nvidia.com>
    Cc: Jérôme Glisse <jglisse@redhat.com>
    Cc: Jan Kara <jack@suse.cz>
    Cc: Dan Williams <dan.j.williams@intel.com>
    Cc: linux-mm@kvack.org
    Cc: linux-arm-kernel@lists.infradead.org
    Cc: linux-samsung-soc@vger.kernel.org
    Cc: linux-media@vger.kernel.org
    Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
    ---
    drivers/gpu/drm/exynos/exynos_drm_g2d.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
    index ecede41af9b9..1e0c5a7f206e 100644
    --- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
    +++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
    @@ -475,7 +475,8 @@ static dma_addr_t *g2d_userptr_get_dma_addr(struct g2d_data *g2d,
    goto err_free;
    }

    - ret = pin_user_pages_fast(start, npages, FOLL_FORCE | FOLL_WRITE,
    + ret = pin_user_pages_fast(start, npages,
    + FOLL_FORCE | FOLL_WRITE | FOLL_LONGTERM,
    g2d_userptr->pages);
    if (ret != npages) {
    DRM_DEV_ERROR(g2d->dev,
    --
    2.29.2
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