diff options
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-dma-contig.c')
| -rw-r--r-- | drivers/media/v4l2-core/videobuf2-dma-contig.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c index 369df95af5c7..94c1e6455d36 100644 --- a/drivers/media/v4l2-core/videobuf2-dma-contig.c +++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c @@ -532,9 +532,7 @@ static void vb2_dc_put_userptr(void *buf_priv) sg_free_table(sgt); kfree(sgt); } - down_read(¤t->mm->mmap_sem); vb2_put_vma(buf->vma); - up_read(¤t->mm->mmap_sem); kfree(buf); } @@ -618,7 +616,6 @@ static void *vb2_dc_get_userptr(void *alloc_ctx, unsigned long vaddr, goto fail_buf; } - down_read(¤t->mm->mmap_sem); /* current->mm->mmap_sem is taken by videobuf2 core */ vma = find_vma(current->mm, vaddr); if (!vma) { @@ -645,7 +642,6 @@ static void *vb2_dc_get_userptr(void *alloc_ctx, unsigned long vaddr, if (ret) { unsigned long pfn; if (vb2_dc_get_user_pfn(start, n_pages, vma, &pfn) == 0) { - up_read(¤t->mm->mmap_sem); buf->dma_addr = vb2_dc_pfn_to_dma(buf->dev, pfn); buf->size = size; kfree(pages); @@ -655,7 +651,6 @@ static void *vb2_dc_get_userptr(void *alloc_ctx, unsigned long vaddr, pr_err("failed to get user pages\n"); goto fail_vma; } - up_read(¤t->mm->mmap_sem); sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); if (!sgt) { @@ -718,12 +713,10 @@ fail_get_user_pages: while (n_pages) put_page(pages[--n_pages]); - down_read(¤t->mm->mmap_sem); fail_vma: vb2_put_vma(buf->vma); fail_pages: - up_read(¤t->mm->mmap_sem); kfree(pages); /* kfree is NULL-proof */ fail_buf: |