---

yaml --- r: 294819 b: refs/heads/master c: 474d567 h: refs/heads/master i: 294817: ff554db 294815: 22668e6 v: v3
git-mirror · Mar 15, 2012 · 3dd9cc4 · 3dd9cc4
1 parent 42d8351
commit 3dd9cc4
Show file tree

Hide file tree

Showing 2 changed files with 14 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 525b233c7188069a360a898493d9b51ee8adec35
+refs/heads/master: 474d567db3d459d08ed0e683f4ace9b00ac2aa4b
diff --git a/trunk/drivers/iommu/amd_iommu_v2.c b/trunk/drivers/iommu/amd_iommu_v2.c
@@ -921,7 +921,16 @@ static int __init amd_iommu_v2_init(void)
 	size_t state_table_size;
 	int ret;
 
-	pr_info("AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@amd.com>");
+	pr_info("AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@amd.com>\n");
+
+	if (!amd_iommu_v2_supported()) {
+		pr_info("AMD IOMMUv2 functionality not available on this sytem\n");
+		/*
+		 * Load anyway to provide the symbols to other modules
+		 * which may use AMD IOMMUv2 optionally.
+		 */
+		return 0;
+	}
 
 	spin_lock_init(&state_lock);
 
@@ -961,6 +970,9 @@ static void __exit amd_iommu_v2_exit(void)
 	size_t state_table_size;
 	int i;
 
+	if (!amd_iommu_v2_supported())
+		return;
+
 	profile_event_unregister(PROFILE_TASK_EXIT, &profile_nb);
 	amd_iommu_unregister_ppr_notifier(&ppr_nb);