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-rw-r--r--virt/kvm/irqchip.c41
1 files changed, 33 insertions, 8 deletions
diff --git a/virt/kvm/irqchip.c b/virt/kvm/irqchip.c
index 1d56a901e791..21c14244f4c4 100644
--- a/virt/kvm/irqchip.c
+++ b/virt/kvm/irqchip.c
@@ -33,7 +33,6 @@
struct kvm_irq_routing_table {
int chip[KVM_NR_IRQCHIPS][KVM_IRQCHIP_NUM_PINS];
- struct kvm_kernel_irq_routing_entry *rt_entries;
u32 nr_rt_entries;
/*
* Array indexed by gsi. Each entry contains list of irq chips
@@ -118,11 +117,32 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
return ret;
}
+static void free_irq_routing_table(struct kvm_irq_routing_table *rt)
+{
+ int i;
+
+ if (!rt)
+ return;
+
+ for (i = 0; i < rt->nr_rt_entries; ++i) {
+ struct kvm_kernel_irq_routing_entry *e;
+ struct hlist_node *n;
+
+ hlist_for_each_entry_safe(e, n, &rt->map[i], link) {
+ hlist_del(&e->link);
+ kfree(e);
+ }
+ }
+
+ kfree(rt);
+}
+
void kvm_free_irq_routing(struct kvm *kvm)
{
/* Called only during vm destruction. Nobody can use the pointer
at this stage */
- kfree(kvm->irq_routing);
+ struct kvm_irq_routing_table *rt = rcu_access_pointer(kvm->irq_routing);
+ free_irq_routing_table(rt);
}
static int setup_routing_entry(struct kvm_irq_routing_table *rt,
@@ -173,25 +193,29 @@ int kvm_set_irq_routing(struct kvm *kvm,
nr_rt_entries += 1;
- new = kzalloc(sizeof(*new) + (nr_rt_entries * sizeof(struct hlist_head))
- + (nr * sizeof(struct kvm_kernel_irq_routing_entry)),
+ new = kzalloc(sizeof(*new) + (nr_rt_entries * sizeof(struct hlist_head)),
GFP_KERNEL);
if (!new)
return -ENOMEM;
- new->rt_entries = (void *)&new->map[nr_rt_entries];
-
new->nr_rt_entries = nr_rt_entries;
for (i = 0; i < KVM_NR_IRQCHIPS; i++)
for (j = 0; j < KVM_IRQCHIP_NUM_PINS; j++)
new->chip[i][j] = -1;
for (i = 0; i < nr; ++i) {
+ struct kvm_kernel_irq_routing_entry *e;
+
+ r = -ENOMEM;
+ e = kzalloc(sizeof(*e), GFP_KERNEL);
+ if (!e)
+ goto out;
+
r = -EINVAL;
if (ue->flags)
goto out;
- r = setup_routing_entry(new, &new->rt_entries[i], ue);
+ r = setup_routing_entry(new, e, ue);
if (r)
goto out;
++ue;
@@ -209,6 +233,7 @@ int kvm_set_irq_routing(struct kvm *kvm,
r = 0;
out:
- kfree(new);
+ free_irq_routing_table(new);
+
return r;
}