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authorRadim Krčmář <rkrcmar@redhat.com>2016-03-02 22:56:46 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2016-03-04 09:30:04 +0100
commit10d2482126d02682d5d21aa5ecdf76d5f49c6740 (patch)
treea0f2e016721d171eaa1ea2090bed29614b86d66f /arch/x86/kvm/i8254.c
parent71474e2f0f439b83b7b53ee6e9cf4f44c15b5806 (diff)
downloadlinux-10d2482126d02682d5d21aa5ecdf76d5f49c6740.tar.bz2
KVM: i8254: refactor kvm_create_pit
Locks are gone, so we don't need to duplicate error paths. Use goto everywhere. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/i8254.c')
-rw-r--r--arch/x86/kvm/i8254.c27
1 files changed, 12 insertions, 15 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 7a2f14bdf4b5..c24735ae1871 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -676,10 +676,8 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
return NULL;
pit->irq_source_id = kvm_request_irq_source_id(kvm);
- if (pit->irq_source_id < 0) {
- kfree(pit);
- return NULL;
- }
+ if (pit->irq_source_id < 0)
+ goto fail_request;
mutex_init(&pit->pit_state.lock);
@@ -690,11 +688,9 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
init_kthread_worker(&pit->worker);
pit->worker_task = kthread_run(kthread_worker_fn, &pit->worker,
"kvm-pit/%d", pid_nr);
- if (IS_ERR(pit->worker_task)) {
- kvm_free_irq_source_id(kvm, pit->irq_source_id);
- kfree(pit);
- return NULL;
- }
+ if (IS_ERR(pit->worker_task))
+ goto fail_kthread;
+
init_kthread_work(&pit->expired, pit_do_work);
pit->kvm = kvm;
@@ -715,7 +711,7 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
ret = kvm_io_bus_register_dev(kvm, KVM_PIO_BUS, KVM_PIT_BASE_ADDRESS,
KVM_PIT_MEM_LENGTH, &pit->dev);
if (ret < 0)
- goto fail;
+ goto fail_register_pit;
if (flags & KVM_PIT_SPEAKER_DUMMY) {
kvm_iodevice_init(&pit->speaker_dev, &speaker_dev_ops);
@@ -723,18 +719,19 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
KVM_SPEAKER_BASE_ADDRESS, 4,
&pit->speaker_dev);
if (ret < 0)
- goto fail_unregister;
+ goto fail_register_speaker;
}
return pit;
-fail_unregister:
+fail_register_speaker:
kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &pit->dev);
-
-fail:
+fail_register_pit:
kvm_pit_set_reinject(pit, false);
- kvm_free_irq_source_id(kvm, pit->irq_source_id);
kthread_stop(pit->worker_task);
+fail_kthread:
+ kvm_free_irq_source_id(kvm, pit->irq_source_id);
+fail_request:
kfree(pit);
return NULL;
}