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-rw-r--r--virt/kvm/kvm_main.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 302681c4aa44..1580dd4ace4e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2926,7 +2926,8 @@ int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
struct kvm_io_bus *new_bus, *bus;
bus = kvm->buses[bus_idx];
- if (bus->dev_count > NR_IOBUS_DEVS - 1)
+ /* exclude ioeventfd which is limited by maximum fd */
+ if (bus->dev_count - bus->ioeventfd_count > NR_IOBUS_DEVS - 1)
return -ENOSPC;
new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count + 1) *
@@ -3181,6 +3182,7 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
out_undebugfs:
unregister_syscore_ops(&kvm_syscore_ops);
+ misc_deregister(&kvm_dev);
out_unreg:
kvm_async_pf_deinit();
out_free: