KVM: Set exit_reason to KVM_EXIT_MMIO where run->mmio is initialized.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index fc63de2..193197f 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -1276,6 +1276,7 @@
 	r = x86_emulate_memop(&emulate_ctxt, &emulate_ops);
 
 	if ((r || vcpu->mmio_is_write) && run) {
+		run->exit_reason = KVM_EXIT_MMIO;
 		run->mmio.phys_addr = vcpu->mmio_phys_addr;
 		memcpy(run->mmio.data, vcpu->mmio_data, 8);
 		run->mmio.len = vcpu->mmio_size;
@@ -1937,7 +1938,6 @@
 			/*
 			 * Read-modify-write.  Back to userspace.
 			 */
-			kvm_run->exit_reason = KVM_EXIT_MMIO;
 			r = 0;
 			goto out;
 		}