The drm_gem_map_detach() can be called with sgt is NULL.
Change-Id: I3b2f5878dfac6e1e77aebeeb7be781113dec59a7
Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
---
drivers/gpu/drm/drm_prime.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
index 1e0de41..ff5fece 100644
--- a/drivers/gpu/drm/drm_prime.c
+++ b/drivers/gpu/drm/drm_prime.c
@@ -119,12 +119,13 @@ static void drm_gem_map_detach(struct dma_buf *dma_buf,
return;
sgt = prime_attach->sgt;
+ if (sgt) {
+ if (prime_attach->dir != DMA_NONE)
+ dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents,
+ prime_attach->dir);
+ sg_free_table(sgt);
+ }
- if (prime_attach->dir != DMA_NONE)
- dma_unmap_sg(attach->dev, sgt->sgl, sgt->nents,
- prime_attach->dir);
-
- sg_free_table(sgt);
kfree(sgt);
kfree(prime_attach);
attach->priv = NULL;
--
1.8.1.2
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