diff options
Diffstat (limited to 'drivers/media/video/videobuf2-dma-sg.c')
| -rw-r--r-- | drivers/media/video/videobuf2-dma-sg.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/media/video/videobuf2-dma-sg.c b/drivers/media/video/videobuf2-dma-sg.c index 3bad8b105fe..25c3b360e1a 100644 --- a/drivers/media/video/videobuf2-dma-sg.c +++ b/drivers/media/video/videobuf2-dma-sg.c @@ -140,7 +140,6 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, if (!buf->pages) goto userptr_fail_pages_array_alloc; - down_read(¤t->mm->mmap_sem); num_pages_from_user = get_user_pages(current, current->mm, vaddr & PAGE_MASK, buf->sg_desc.num_pages, @@ -148,7 +147,7 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr, 1, /* force */ buf->pages, NULL); - up_read(¤t->mm->mmap_sem); + if (num_pages_from_user != buf->sg_desc.num_pages) goto userptr_fail_get_user_pages; |