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