mdp3: Prevent deref of invalid pointer that contains err code



It is possible that mdp3_iommu_meta_put with a non null iommu_meta
that contains PTR_ERR value.

Change-Id: I440c78e324f558fec22d2db373dfd2c0e4d5fbb7
Signed-off-by: Terence Hampson <thampson@codeaurora.org>

parent bfd7e850

drivers/video/msm/mdss/mdp3.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1444,7 +1444,9 @@ int mdp3_self_map_iommu(struct ion_client client, struct ion_handle handle,
		ret = 0;
		} else {
		ret = PTR_ERR(iommu_meta);
		goto out_unlock;
		mutex_unlock(&mdp3_res->iommu_lock);
		pr_err("%s: meta_create failed err=%d", __func__, ret);
		return ret;
		}
		} else {
		if (iommu_meta->flags != iommu_flags) {