linux-kernel - [PATCH 05/10] iommu/amd: Free page-table in protection_domain

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Message-Id: <20200527115313.7426-6-joro@8bytes.org>
Date:   Wed, 27 May 2020 13:53:08 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Joerg Roedel <joro@...tes.org>
Cc:     linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        jroedel@...e.de
Subject: [PATCH 05/10] iommu/amd: Free page-table in protection_domain_free()

From: Joerg Roedel <jroedel@...e.de>

Align release of the page-table with the place where it is allocated.

Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
 drivers/iommu/amd/iommu.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 0d5a5dbee9f3..5282ff6b8ea0 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2387,12 +2387,18 @@ static void cleanup_domain(struct protection_domain *domain)
 
 static void protection_domain_free(struct protection_domain *domain)
 {
+	struct domain_pgtable pgtable;
+
 	if (!domain)
 		return;
 
 	if (domain->id)
 		domain_id_free(domain->id);
 
+	amd_iommu_domain_get_pgtable(domain, &pgtable);
+	atomic64_set(&domain->pt_root, 0);
+	free_pagetable(&pgtable);
+
 	kfree(domain);
 }
 
@@ -2476,7 +2482,6 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned type)
 static void amd_iommu_domain_free(struct iommu_domain *dom)
 {
 	struct protection_domain *domain;
-	struct domain_pgtable pgtable;
 
 	domain = to_pdomain(dom);
 
@@ -2494,10 +2499,6 @@ static void amd_iommu_domain_free(struct iommu_domain *dom)
 		dma_ops_domain_free(domain);
 		break;
 	default:
-		amd_iommu_domain_get_pgtable(domain, &pgtable);
-		atomic64_set(&domain->pt_root, 0);
-		free_pagetable(&pgtable);
-
 		if (domain->flags & PD_IOMMUV2_MASK)
 			free_gcr3_table(domain);
 
-- 
2.17.1