KVM: Clean up coalesced_mmio destruction

We invoke kfree() on a data member instead of the structure.  This works today
because the kvm_io_device is the first element of the private structure, but
this could change in the future, so lets clean this up.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
index 5ae620d32fac..03ea2807b1f2 100644
--- a/virt/kvm/coalesced_mmio.c
+++ b/virt/kvm/coalesced_mmio.c
@@ -80,7 +80,10 @@ static void coalesced_mmio_write(struct kvm_io_device *this,
 
 static void coalesced_mmio_destructor(struct kvm_io_device *this)
 {
-        kfree(this);
+        struct kvm_coalesced_mmio_dev *dev =
+                (struct kvm_coalesced_mmio_dev *)this->private;
+
+        kfree(dev);
 }
 
 int kvm_coalesced_mmio_init(struct kvm *kvm)