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KVM: return an error code in kvm_vm_ioctl_register_coalesced_mmio()

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If kvm_io_bus_register_dev() fails then it returns success but it should
return an error code.

I also did a little cleanup like removing an impossible NULL test.

Cc: stable@vger.kernel.org
Fixes: 2b3c246a682c ('KVM: Make coalesced mmio use a device per zone')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Dan Carpenter 2014-01-29 16:16:39 +03:00 committed by Paolo Bonzini
parent b73117c493
commit aac5c4226e
1 changed files with 2 additions and 6 deletions
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8
virt/kvm/coalesced_mmio.c
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@ -154,17 +154,13 @@ int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm,
list_add_tail(&dev->list, &kvm->coalesced_zones);
mutex_unlock(&kvm->slots_lock);
return ret;
return 0;
out_free_dev:
mutex_unlock(&kvm->slots_lock);
kfree(dev);
if (dev == NULL)
return -ENXIO;
return 0;
return ret;
}
int kvm_vm_ioctl_unregister_coalesced_mmio(struct kvm *kvm,