diff options
Diffstat (limited to 'bsd-core/drm_vm.c')
| -rw-r--r-- | bsd-core/drm_vm.c | 37 |
1 files changed, 30 insertions, 7 deletions
diff --git a/bsd-core/drm_vm.c b/bsd-core/drm_vm.c index d9ee0b3d..da815329 100644 --- a/bsd-core/drm_vm.c +++ b/bsd-core/drm_vm.c @@ -1,3 +1,26 @@ +/* + * Copyright 2003 Eric Anholt + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ #if defined(__FreeBSD__) && __FreeBSD_version >= 500102 static int DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, vm_paddr_t *paddr, @@ -9,12 +32,12 @@ static paddr_t DRM(dma_mmap)(dev_t kdev, vm_offset_t offset, int prot) #endif { DRM_DEVICE; - drm_device_dma_t *dma = dev->dma; - unsigned long physical; - unsigned long page; + drm_device_dma_t *dma = dev->dma; + unsigned long physical; + unsigned long page; - if (!dma) return -1; /* Error */ - if (!dma->pagelist) return -1; /* Nothing allocated */ + if (dma == NULL || dma->pagelist == NULL) + return -1; page = offset >> PAGE_SHIFT; physical = dma->pagelist[page]; @@ -38,8 +61,8 @@ paddr_t DRM(mmap)(dev_t kdev, off_t offset, int prot) #endif { DRM_DEVICE; - drm_local_map_t *map = NULL; - drm_map_list_entry_t *listentry=NULL; + drm_local_map_t *map = NULL; + drm_map_list_entry_t *listentry = NULL; drm_file_t *priv; priv = DRM(find_file_by_proc)(dev, DRM_CURPROC); |