[PATCH 03/10] drm/msm: Gracefully handle failure in _msm_gem_kernel_new

[Jordan Crouse <jcrouse-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>]

If any of the function calls in _msm_gem_kernel_new fail we need
to make sure to dereference the GEM object with the appropriate
function for the current locking state.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---
 drivers/gpu/drm/msm/msm_gem.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index 00c795ced02c..4646e9e45fc2 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -1041,23 +1041,29 @@ static void *_msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
 
 	if (iova) {
 		ret = msm_gem_get_iova(obj, aspace, iova);
-		if (ret) {
-			drm_gem_object_put(obj);
-			return ERR_PTR(ret);
-		}
+		if (ret)
+			goto err;
 	}
 
 	vaddr = msm_gem_get_vaddr(obj);
 	if (IS_ERR(vaddr)) {
 		msm_gem_put_iova(obj, aspace);
-		drm_gem_object_put(obj);
-		return ERR_CAST(vaddr);
+		ret = PTR_ERR(vaddr);
+		goto err;
 	}
 
 	if (bo)
 		*bo = obj;
 
 	return vaddr;
+err:
+	if (locked)
+		drm_gem_object_put(obj);
+	else
+		drm_gem_object_put_unlocked(obj);
+
+	return ERR_PTR(ret);
+
 }
 
 void *msm_gem_kernel_new(struct drm_device *dev, uint32_t size,
-- 
2.18.0

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