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sample/mdev/mbochs: add mbochs_kunmap_dmabuf

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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 <kraxel@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Gerd Hoffmann 2018-06-25 08:44:52 +02:00 committed by Alex Williamson
parent 2203d8a76e
commit 7733e05b34
1 changed files with 7 additions and 0 deletions
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7
samples/vfio-mdev/mbochs.c
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@ -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,
};