From 72bb2fcd23afe8db53b47e8f9edd736c517ba532 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Tue, 9 Feb 2010 10:33:03 +0800 Subject: [PATCH] KVM: cleanup the failure path of KVM_CREATE_IRQCHIP ioctrl If we fail to init ioapic device or the fail to setup the default irq routing, the device register by kvm_create_pic() and kvm_ioapic_init() remain unregister. This patch fixed to do this. Signed-off-by: Wei Yongjun Signed-off-by: Avi Kivity --- arch/x86/kvm/i8259.c | 11 +++++++++++ arch/x86/kvm/irq.h | 1 + arch/x86/kvm/x86.c | 8 ++++---- virt/kvm/ioapic.c | 11 +++++++++++ virt/kvm/ioapic.h | 1 + 5 files changed, 28 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index d5753a75..a3711f9 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -543,3 +543,14 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm) return s; } + +void kvm_destroy_pic(struct kvm *kvm) +{ + struct kvm_pic *vpic = kvm->arch.vpic; + + if (vpic) { + kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &vpic->dev); + kvm->arch.vpic = NULL; + kfree(vpic); + } +} diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h index be399e2..0b71d48 100644 --- a/arch/x86/kvm/irq.h +++ b/arch/x86/kvm/irq.h @@ -75,6 +75,7 @@ struct kvm_pic { }; struct kvm_pic *kvm_create_pic(struct kvm *kvm); +void kvm_destroy_pic(struct kvm *kvm); int kvm_pic_read_irq(struct kvm *kvm); void kvm_pic_update_irq(struct kvm_pic *s); void kvm_pic_clear_isr_ack(struct kvm *kvm); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index bd3161c..b2f91b9 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2771,6 +2771,8 @@ long kvm_arch_vm_ioctl(struct file *filp, if (vpic) { r = kvm_ioapic_init(kvm); if (r) { + kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, + &vpic->dev); kfree(vpic); goto create_irqchip_unlock; } @@ -2782,10 +2784,8 @@ long kvm_arch_vm_ioctl(struct file *filp, r = kvm_setup_default_irq_routing(kvm); if (r) { mutex_lock(&kvm->irq_lock); - kfree(kvm->arch.vpic); - kfree(kvm->arch.vioapic); - kvm->arch.vpic = NULL; - kvm->arch.vioapic = NULL; + kvm_ioapic_destroy(kvm); + kvm_destroy_pic(kvm); mutex_unlock(&kvm->irq_lock); } create_irqchip_unlock: diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c index f3d0693..3db15a8 100644 --- a/virt/kvm/ioapic.c +++ b/virt/kvm/ioapic.c @@ -401,6 +401,17 @@ int kvm_ioapic_init(struct kvm *kvm) return ret; } +void kvm_ioapic_destroy(struct kvm *kvm) +{ + struct kvm_ioapic *ioapic = kvm->arch.vioapic; + + if (ioapic) { + kvm_io_bus_unregister_dev(kvm, KVM_MMIO_BUS, &ioapic->dev); + kvm->arch.vioapic = NULL; + kfree(ioapic); + } +} + int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state) { struct kvm_ioapic *ioapic = ioapic_irqchip(kvm); diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h index a505ce90..8a751b7 100644 --- a/virt/kvm/ioapic.h +++ b/virt/kvm/ioapic.h @@ -72,6 +72,7 @@ int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2); void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode); int kvm_ioapic_init(struct kvm *kvm); +void kvm_ioapic_destroy(struct kvm *kvm); int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level); void kvm_ioapic_reset(struct kvm_ioapic *ioapic); int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, -- 2.7.4