From a2acfb75792511a35586db80a38b8e4701a97730 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <joerg.roedel@amd.com>
Date: Tue, 2 Dec 2008 18:28:53 +0100
Subject: AMD IOMMU: add domain id free function
Impact: add code to release a domain id
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kernel/amd_iommu.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
(limited to 'arch/x86/kernel/amd_iommu.c')
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 8a0fd3d09973..0922d5fe633c 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -571,6 +571,18 @@ static u16 domain_id_alloc(void)
return id;
}
+#ifdef CONFIG_IOMMU_API
+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);
+}
+#endif
+
/*
* Used to reserve address ranges in the aperture (e.g. for exclusion
* ranges.
--
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