diff options
Diffstat (limited to 'linux-core/drm_bufs.c')
| -rw-r--r-- | linux-core/drm_bufs.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c index 77573709..e30e6de8 100644 --- a/linux-core/drm_bufs.c +++ b/linux-core/drm_bufs.c @@ -161,6 +161,12 @@ int DRM(addmap)( struct inode *inode, struct file *filp, } map->offset = (unsigned long)map->handle; if ( map->flags & _DRM_CONTAINS_LOCK ) { + /* Prevent a 2nd X Server from creating a 2nd lock */ + if (dev->lock.hw_lock != NULL) { + vfree( map->handle ); + DRM(free)( map, sizeof(*map), DRM_MEM_MAPS ); + return -EBUSY; + } dev->sigdata.lock = dev->lock.hw_lock = map->handle; /* Pointer to lock */ } |