Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Gerd Hoffmann <kraxel@redhat.com>
To:     dri-devel@lists.freedesktop.org
Cc:     intel-gfx@lists.freedesktop.org, Gerd Hoffmann <kraxel@redhat.com>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <mripard@kernel.org>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        linux-kernel@vger.kernel.org (open list)
Subject: [PATCH 2/2] drm: share address space for dma bufs
Date:   Thu, 21 Nov 2019 11:38:07 +0100
Message-Id: <20191121103807.18424-3-kraxel@redhat.com>
In-Reply-To: <20191121103807.18424-1-kraxel@redhat.com>
References: <20191121103807.18424-1-kraxel@redhat.com>
Content-Type: text/plain; charset=WINDOWS-1252
Content-Transfer-Encoding: quoted-printable
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Use the shared address space of the drm device (see drm_open() in
drm_file.c) for dma-bufs too.  That removes a difference betweem drm
device mmap vmas and dma-buf mmap vmas and fixes corner cases like
unmaps not working properly.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/drm_prime.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index a9633bd241bb..c3fc341453c0 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -240,6 +240,7 @@ void drm_prime_destroy_file_private(struct drm_prime_fi=
le_private *prime_fpriv)
 struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
 =09=09=09=09      struct dma_buf_export_info *exp_info)
 {
+=09struct drm_gem_object *obj =3D exp_info->priv;
 =09struct dma_buf *dma_buf;
=20
 =09dma_buf =3D dma_buf_export(exp_info);
@@ -247,7 +248,8 @@ struct dma_buf *drm_gem_dmabuf_export(struct drm_device=
 *dev,
 =09=09return dma_buf;
=20
 =09drm_dev_get(dev);
-=09drm_gem_object_get(exp_info->priv);
+=09drm_gem_object_get(obj);
+=09dma_buf->file->f_mapping =3D obj->dev->anon_inode->i_mapping;
=20
 =09return dma_buf;
 }
--=20
2.18.1