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path: root/drivers/media/video/videobuf2-dma-sg.c
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Diffstat (limited to 'drivers/media/video/videobuf2-dma-sg.c')
-rw-r--r--drivers/media/video/videobuf2-dma-sg.c3
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(&current->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(&current->mm->mmap_sem);
+
if (num_pages_from_user != buf->sg_desc.num_pages)
goto userptr_fail_get_user_pages;