sample/mdev/mbochs: add mbochs_kunmap_dmabuf

There is no default implementation for dma_buf_ops->unmap. So add a function unmapping the page, otherwise we'll leak them. Signed-off-by: Gerd Hoffmann <[email protected]> Signed-off-by: Alex Williamson <[email protected]>
ambv · Jun 26, 2018 · 7733e05 · 7733e05
1 parent 2203d8a
commit 7733e05
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
@@ -811,11 +811,18 @@ static void *mbochs_kmap_dmabuf(struct dma_buf *buf, unsigned long page_num)
 	return kmap(page);
 }
 
+static void mbochs_kunmap_dmabuf(struct dma_buf *buf, unsigned long page_num,
+				 void *vaddr)
+{
+	kunmap(vaddr);
+}
+
 static struct dma_buf_ops mbochs_dmabuf_ops = {
 	.map_dma_buf	  = mbochs_map_dmabuf,
 	.unmap_dma_buf	  = mbochs_unmap_dmabuf,
 	.release	  = mbochs_release_dmabuf,
 	.map		  = mbochs_kmap_dmabuf,
+	.unmap		  = mbochs_kunmap_dmabuf,
 	.mmap		  = mbochs_mmap_dmabuf,
 };