From: Dmitry Osipenko <digetx@gmail.com>
Date: Wed, 6 Mar 2019 22:50:08 +0000 (+0300)
Subject: iommu/tegra-smmu: Properly release domain resources
X-Git-Tag: for-linus-20190516~6^2^2~1
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=4f97031ff8605c1e8388a650bc5708ceda4357d5;p=linux-block.git

iommu/tegra-smmu: Properly release domain resources

Release all memory allocations associated with a released domain and emit
warning if domain is in-use at the time of destruction.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 8d30653cd13a..27b1249f0773 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -327,6 +327,9 @@ static void tegra_smmu_domain_free(struct iommu_domain *domain)
 
 	/* TODO: free page directory and page tables */
 
+	WARN_ON_ONCE(as->use_count);
+	kfree(as->count);
+	kfree(as->pts);
 	kfree(as);
 }