diff options
Diffstat (limited to 'drivers/media/common/videobuf2/frame_vector.c')
| -rw-r--r-- | drivers/media/common/videobuf2/frame_vector.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/media/common/videobuf2/frame_vector.c b/drivers/media/common/videobuf2/frame_vector.c index 144027035892..89eebc3341b8 100644 --- a/drivers/media/common/videobuf2/frame_vector.c +++ b/drivers/media/common/videobuf2/frame_vector.c @@ -14,6 +14,7 @@ * get_vaddr_frames() - map virtual addresses to pfns * @start: starting user address * @nr_frames: number of pages / pfns from start to map + * @write: the mapped address has write permission * @vec: structure which receives pages / pfns of the addresses mapped. * It should have space for at least nr_frames entries. * @@ -32,10 +33,11 @@ * * This function takes care of grabbing mmap_lock as necessary. */ -int get_vaddr_frames(unsigned long start, unsigned int nr_frames, +int get_vaddr_frames(unsigned long start, unsigned int nr_frames, bool write, struct frame_vector *vec) { int ret; + unsigned int gup_flags = FOLL_FORCE | FOLL_LONGTERM; if (nr_frames == 0) return 0; @@ -45,8 +47,10 @@ int get_vaddr_frames(unsigned long start, unsigned int nr_frames, start = untagged_addr(start); - ret = pin_user_pages_fast(start, nr_frames, - FOLL_FORCE | FOLL_WRITE | FOLL_LONGTERM, + if (write) + gup_flags |= FOLL_WRITE; + + ret = pin_user_pages_fast(start, nr_frames, gup_flags, (struct page **)(vec->ptrs)); vec->got_ref = true; vec->is_pfns = false; |