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| author | David Herrmann <dh.herrmann@gmail.com> | 2014-01-03 14:24:19 +0100 |
|---|---|---|
| committer | David Herrmann <dh.herrmann@gmail.com> | 2014-03-16 12:23:33 +0100 |
| commit | 6796cb16c088905bf3af40548fda68c09e6f6ee5 (patch) | |
| tree | d40162f17dad7b54ac63feaf62b7c84493556f5a /drivers/gpu/drm/mgag200 | |
| parent | drm: add pseudo filesystem for shared inodes (diff) | |
| download | linux-6796cb16c088905bf3af40548fda68c09e6f6ee5.tar.xz linux-6796cb16c088905bf3af40548fda68c09e6f6ee5.zip | |
drm: use anon-inode instead of relying on cdevs
DRM drivers share a common address_space across all character-devices of a
single DRM device. This allows simple buffer eviction and mapping-control.
However, DRM core currently waits for the first ->open() on any char-dev
to mark the underlying inode as backing inode of the device. This delayed
initialization causes ugly conditions all over the place:
if (dev->dev_mapping)
do_sth();
To avoid delayed initialization and to stop reusing the inode of the
char-dev, we allocate an anonymous inode for each DRM device and reset
filp->f_mapping to it on ->open().
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Diffstat (limited to 'drivers/gpu/drm/mgag200')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_ttm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_ttm.c b/drivers/gpu/drm/mgag200/mgag200_ttm.c index adb5166a5dfd..c1c2cb608ab3 100644 --- a/drivers/gpu/drm/mgag200/mgag200_ttm.c +++ b/drivers/gpu/drm/mgag200/mgag200_ttm.c @@ -324,7 +324,7 @@ int mgag200_bo_create(struct drm_device *dev, int size, int align, } mgabo->bo.bdev = &mdev->ttm.bdev; - mgabo->bo.bdev->dev_mapping = dev->dev_mapping; + mgabo->bo.bdev->dev_mapping = dev->anon_inode->i_mapping; mgag200_ttm_placement(mgabo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM); |