diff options
| author | Eric Anholt <eric@anholt.net> | 2007-08-15 14:29:31 -0700 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2007-08-15 14:29:31 -0700 |
| commit | b668d6d9050106bebfb704e4ed32d2924bb26371 (patch) | |
| tree | efdc06fab9804aebb52312ef72de029e2821aaf8 /bsd-core/drm_bufs.c | |
| parent | 6e93c35ba7c5001e756d0c9d1a4f534384652a5a (diff) | |
Fix dev->agp->base initialization on BSD, and fix addmap range check on Linux.
With the previous linux commit, an AGP aperture at the end of the address space
would have wrapped to 0 and the test would have failed.
Diffstat (limited to 'bsd-core/drm_bufs.c')
| -rw-r--r-- | bsd-core/drm_bufs.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/bsd-core/drm_bufs.c b/bsd-core/drm_bufs.c index 65d8c82b..9b58c593 100644 --- a/bsd-core/drm_bufs.c +++ b/bsd-core/drm_bufs.c @@ -191,7 +191,17 @@ int drm_addmap(drm_device_t * dev, unsigned long offset, unsigned long size, break; case _DRM_AGP: /*valid = 0;*/ - map->offset += dev->agp->base; + /* In some cases (i810 driver), user space may have already + * added the AGP base itself, because dev->agp->base previously + * only got set during AGP enable. So, only add the base + * address if the map's offset isn't already within the + * aperture. + */ + if (map->offset < dev->agp->base || + map->offset > dev->agp->base + + dev->agp->info.ai_aperture_size - 1) { + map->offset += dev->agp->base; + } map->mtrr = dev->agp->mtrr; /* for getmap */ /*for (entry = dev->agp->memory; entry; entry = entry->next) { if ((map->offset >= entry->bound) && |