[PATCH 12/20] iommu/amd: Allow NULL pointer parameter for domain_flush_complete()

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From	Joerg Roedel <joro@8bytes.org>
Newsgroups	linux.kernel
Subject	[PATCH 12/20] iommu/amd: Allow NULL pointer parameter for domain_flush_complete()
Date	Fri, 08 Jul 2016 13:50:02 +0200
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From: Joerg Roedel <jroedel@suse.de>

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 4e27c57..7b8e1f8 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -1185,7 +1185,7 @@ 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;
 
 		/*
-- 
1.9.1

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[PATCH 12/20] iommu/amd: Allow NULL pointer parameter for domain_flush_complete() Joerg Roedel <joro@8bytes.org> - 2016-07-08 13:50 +0200

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