KVM: fix the errno of ioctl KVM_[UN]REGISTER_COALESCED_MMIO failure

Commit Message

Wei Yongjun March 12, 2010, 4:59 a.m. UTC

None

Patch

diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
index 5169736..22500d4 100644
--- a/virt/kvm/coalesced_mmio.c
+++ b/virt/kvm/coalesced_mmio.c
@@ -138,7 +138,7 @@  int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm,
 	struct kvm_coalesced_mmio_dev *dev = kvm->coalesced_mmio_dev;
 
 	if (dev == NULL)
-		return -EINVAL;
+		return -ENXIO;
 
 	mutex_lock(&kvm->slots_lock);
 	if (dev->nb_zones >= KVM_COALESCED_MMIO_ZONE_MAX) {
@@ -161,7 +161,7 @@  int kvm_vm_ioctl_unregister_coalesced_mmio(struct kvm *kvm,
 	struct kvm_coalesced_mmio_zone *z;
 
 	if (dev == NULL)
-		return -EINVAL;
+		return -ENXIO;
 
 	mutex_lock(&kvm->slots_lock);
 
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 0e06a6d..861435e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1603,7 +1603,6 @@  static long kvm_vm_ioctl(struct file *filp,
 		r = -EFAULT;
 		if (copy_from_user(&zone, argp, sizeof zone))
 			goto out;
-		r = -ENXIO;
 		r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone);
 		if (r)
 			goto out;
@@ -1615,7 +1614,6 @@  static long kvm_vm_ioctl(struct file *filp,
 		r = -EFAULT;
 		if (copy_from_user(&zone, argp, sizeof zone))
 			goto out;
-		r = -ENXIO;
 		r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone);
 		if (r)
 			goto out;