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Subject[PATCH 05/21] AMD IOMMU: add domain id free function
Date
Impact: add code to release a domain id

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kernel/amd_iommu.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 85a62e9..11de0f1 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -569,6 +569,16 @@ static u16 domain_id_alloc(void)
return id;
}

+static void domain_id_free(int id)
+{
+ unsigned long flags;
+
+ write_lock_irqsave(&amd_iommu_devtable_lock, flags);
+ if (id > 0 && id < MAX_DOMAIN_ID)
+ __clear_bit(id, amd_iommu_pd_alloc_bitmap);
+ write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
+}
+
/*
* Used to reserve address ranges in the aperture (e.g. for exclusion
* ranges.
--
1.5.6.4



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