diff options
| author | David Herrmann <dh.herrmann@gmail.com> | 2014-01-03 17:24:19 +0400 |
|---|---|---|
| committer | David Herrmann <dh.herrmann@gmail.com> | 2014-03-16 15:23:33 +0400 |
| commit | 6796cb16c088905bf3af40548fda68c09e6f6ee5 (patch) | |
| tree | d40162f17dad7b54ac63feaf62b7c84493556f5a /drivers/gpu/drm/cirrus | |
| parent | 31bbe16f6d88622d6731fa2cb4ab38d57d844ac1 (diff) | |
| download | linux-6796cb16c088905bf3af40548fda68c09e6f6ee5.tar.xz | |
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/cirrus')
| -rw-r--r-- | drivers/gpu/drm/cirrus/cirrus_ttm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/cirrus/cirrus_ttm.c b/drivers/gpu/drm/cirrus/cirrus_ttm.c index 8b37c25ff9bd..efcbd70a8774 100644 --- a/drivers/gpu/drm/cirrus/cirrus_ttm.c +++ b/drivers/gpu/drm/cirrus/cirrus_ttm.c @@ -329,7 +329,7 @@ int cirrus_bo_create(struct drm_device *dev, int size, int align, } cirrusbo->bo.bdev = &cirrus->ttm.bdev; - cirrusbo->bo.bdev->dev_mapping = dev->dev_mapping; + cirrusbo->bo.bdev->dev_mapping = dev->anon_inode->i_mapping; cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM); |