KVM: Fix assigned devices circular locking dependency

[safe/jmp/linux-2.6] / virt / kvm / iommu.c

diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c
index e9693a2..4c40375 100644 (file)
--- a/virt/kvm/iommu.c
+++ b/virt/kvm/iommu.c
@@ -73,14 +73,13 @@ static int kvm_iommu_map_memslots(struct kvm *kvm)
 {
        int i, r = 0;
 
-       down_read(&kvm->slots_lock);
        for (i = 0; i < kvm->nmemslots; i++) {
                r = kvm_iommu_map_pages(kvm, kvm->memslots[i].base_gfn,
                                        kvm->memslots[i].npages);
                if (r)
                        break;
        }
-       up_read(&kvm->slots_lock);
+
        return r;
 }
 
@@ -190,12 +189,11 @@ static void kvm_iommu_put_pages(struct kvm *kvm,
 static int kvm_iommu_unmap_memslots(struct kvm *kvm)
 {
        int i;
-       down_read(&kvm->slots_lock);
+
        for (i = 0; i < kvm->nmemslots; i++) {
                kvm_iommu_put_pages(kvm, kvm->memslots[i].base_gfn,
                                    kvm->memslots[i].npages);
        }
-       up_read(&kvm->slots_lock);
 
        return 0;
 }