[PATCH next] drm/amdgpu: unlock and cleanup on error in amdgpu_cs_parser_bos()

[Dan Carpenter]

If amdgpu_hmm_range_alloc() fails then free the previous iterations and
call mutex_unlock(&p->bo_list->bo_list_mutex) before returning.

Fixes: e095b55155ef ("drm/amdgpu: use user provided hmm_range buffer in 
amdgpu_ttm_tt_get_user_pages")
Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index ecdfe6cb36cc..dac0b15823f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -892,8 +892,10 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
                struct amdgpu_bo *bo = e->bo;
 
                e->range = amdgpu_hmm_range_alloc(NULL);
-               if (unlikely(!e->range))
-                       return -ENOMEM;
+               if (unlikely(!e->range)) {
+                       r = -ENOMEM;
+                       goto out_free_user_pages;
+               }
 
                r = amdgpu_ttm_tt_get_user_pages(bo, e->range);
                if (r)
-- 
2.51.0