From f1eae7c58036b30d434d84a34c6c3154bfb5b496 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@suse.de>
Date: Wed, 6 Jul 2016 12:50:35 +0200
Subject: [PATCH] iommu/amd: Allow NULL pointer parameter for
domain_flush_complete()
If domain == NULL is passed to the function, it will queue a
completion-wait command on all IOMMUs in the system.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/amd_iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 38f8a5e461fcb..0884b126d9323 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1177,7 +1177,7 @@ static void domain_flush_complete(struct protection_domain *domain)
int i;
for (i = 0; i < amd_iommus_present; ++i) {
- if (!domain->dev_iommu[i])
+ if (domain && !domain->dev_iommu[i])
continue;
/*