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@xxxxxxxxxx>
---
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_file_private *prime_fpriv)
struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
struct dma_buf_export_info *exp_info)
{
+ struct drm_gem_object *obj = exp_info->priv;
struct dma_buf *dma_buf;
dma_buf = dma_buf_export(exp_info);
@@ -247,7 +248,8 @@ struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev,
return dma_buf;
drm_dev_get(dev);
- drm_gem_object_get(exp_info->priv);
+ drm_gem_object_get(obj);
+ dma_buf->file->f_mapping = obj->dev->anon_inode->i_mapping;
return dma_buf;
}
--
2.18.1
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