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

This patch change the errno of ioctl KVM_[UN]REGISTER_COALESCED_MMIO
from -EINVAL to -ENXIO if no coalesced mmio dev exists.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
index 36e2580..b66001f 100644 (file)
--- a/virt/kvm/coalesced_mmio.c
+++ b/virt/kvm/coalesced_mmio.c
@@ -139,7 +139,7 @@ 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) {
@@ -162,7 +162,7 @@ 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 b152b23..0db6dfc 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1609,7 +1609,6 @@ 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;
@@ -1621,7 +1620,6 @@ 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;