path: root/virt/kvm/ioapic.c
diff options
authorGregory Haskins <ghaskins@novell.com>2009-07-07 17:08:44 -0400
committerAvi Kivity <avi@redhat.com>2009-09-10 08:33:12 +0300
commit090b7aff27120cdae76a346a70db394844fea598 (patch)
tree4676410f57a44d7c0fba9d791fc77d7850ad1d51 /virt/kvm/ioapic.c
parentfef07aae9cd9ed82f94228c311b35360f1f38902 (diff)
KVM: make io_bus interface more robust
Today kvm_io_bus_regsiter_dev() returns void and will internally BUG_ON if it fails. We want to create dynamic MMIO/PIO entries driven from userspace later in the series, so we need to enhance the code to be more robust with the following changes: 1) Add a return value to the registration function 2) Fix up all the callsites to check the return code, handle any failures, and percolate the error up to the caller. 3) Add an unregister function that collapses holes in the array Signed-off-by: Gregory Haskins <ghaskins@novell.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt/kvm/ioapic.c')
1 files changed, 6 insertions, 2 deletions
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index b91fbb21544..fa05f67423a 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -342,6 +342,7 @@ static const struct kvm_io_device_ops ioapic_mmio_ops = {
int kvm_ioapic_init(struct kvm *kvm)
struct kvm_ioapic *ioapic;
+ int ret;
ioapic = kzalloc(sizeof(struct kvm_ioapic), GFP_KERNEL);
if (!ioapic)
@@ -350,7 +351,10 @@ int kvm_ioapic_init(struct kvm *kvm)
kvm_iodevice_init(&ioapic->dev, &ioapic_mmio_ops);
ioapic->kvm = kvm;
- kvm_io_bus_register_dev(kvm, &kvm->mmio_bus, &ioapic->dev);
- return 0;
+ ret = kvm_io_bus_register_dev(kvm, &kvm->mmio_bus, &ioapic->dev);
+ if (ret < 0)
+ kfree(ioapic);
+ return ret;