[PATCH 5.1 080/121] udmabuf: actually unmap the scatterlist

[Greg Kroah-Hartman]

[ Upstream commit 283f1e383e91d96fe652fad549537ae15cf31d60 ]

unmap_udmabuf fails to actually unmap the scatterlist, leaving dangling
mappings around.

Fixes: fbb0de795078 ("Add udmabuf misc device")
Signed-off-by: Lucas Stach <l.st...@pengutronix.de>
Link: 
http://patchwork.freedesktop.org/patch/msgid/20190604202331.17482-1-l.st...@pengutronix.de
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/dma-buf/udmabuf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index cd57747286f2..9635897458a0 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -77,6 +77,7 @@ static void unmap_udmabuf(struct dma_buf_attachment *at,
                          struct sg_table *sg,
                          enum dma_data_direction direction)
 {
+       dma_unmap_sg(at->dev, sg->sgl, sg->nents, direction);
        sg_free_table(sg);
        kfree(sg);
 }
-- 
2.20.1