[kvm-devel] [PATCH 1/3] kvm_free_lapic() to pair with kvm_create_lapic()

[Rusty Russell]

Instead of the asymetry of kvm_free_apic, implement kvm_free_lapic().
And guess what?  I found a minor bug: we don't need to hrtimer_cancel()
from kvm_main.c, because we do that in kvm_free_apic().

Also:
1) kvm_vcpu_uninit should be the reverse order from kvm_vcpu_init.
2) Don't set apic->regs_page to zero before freeing apic.

Signed-off-by: Rusty Russell <[EMAIL PROTECTED]>

diff --git a/drivers/kvm/irq.h b/drivers/kvm/irq.h
index 11fc014..508280e 100644
--- a/drivers/kvm/irq.h
+++ b/drivers/kvm/irq.h
@@ -139,7 +139,7 @@ int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
 int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
 int kvm_create_lapic(struct kvm_vcpu *vcpu);
 void kvm_lapic_reset(struct kvm_vcpu *vcpu);
-void kvm_free_apic(struct kvm_lapic *apic);
+void kvm_free_lapic(struct kvm_vcpu *vcpu);
 u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
 void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
 void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 2c3986f..f82b5ad 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -288,10 +288,8 @@ EXPORT_SYMBOL_GPL(kvm_vcpu_init);
 
 void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
 {
+       kvm_free_lapic(vcpu);
        kvm_mmu_destroy(vcpu);
-       if (vcpu->apic)
-               hrtimer_cancel(&vcpu->apic->timer.dev);
-       kvm_free_apic(vcpu->apic);
        free_page((unsigned long)vcpu->pio_data);
        free_page((unsigned long)vcpu->run);
 }
diff --git a/drivers/kvm/lapic.c b/drivers/kvm/lapic.c
index 6e0f7e5..27e6249 100644
--- a/drivers/kvm/lapic.c
+++ b/drivers/kvm/lapic.c
@@ -739,19 +739,17 @@ static int apic_mmio_range(struct kvm_io_device *this, 
gpa_t addr)
        return ret;
 }
 
-void kvm_free_apic(struct kvm_lapic *apic)
+void kvm_free_lapic(struct kvm_vcpu *vcpu)
 {
-       if (!apic)
+       if (!vcpu->apic)
                return;
 
-       hrtimer_cancel(&apic->timer.dev);
+       hrtimer_cancel(&vcpu->apic->timer.dev);
 
-       if (apic->regs_page) {
-               __free_page(apic->regs_page);
-               apic->regs_page = 0;
-       }
+       if (vcpu->apic->regs_page)
+               __free_page(vcpu->apic->regs_page);
 
-       kfree(apic);
+       kfree(vcpu->apic);
 }
 
 /*
@@ -939,7 +937,7 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
        if (apic->regs_page == NULL) {
                printk(KERN_ERR "malloc apic regs error for vcpu %x\n",
                       vcpu->vcpu_id);
-               goto nomem;
+               goto nomem_free_apic;
        }
        apic->regs = page_address(apic->regs_page);
        memset(apic->regs, 0, PAGE_SIZE);
@@ -957,8 +955,9 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
        apic->dev.private = apic;
 
        return 0;
+nomem_free_apic:
+       kfree(apic);
 nomem:
-       kvm_free_apic(apic);
        return -ENOMEM;
 }
 EXPORT_SYMBOL_GPL(kvm_create_lapic);

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