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Date: Mon, 19 Oct 2020 17:06:57 +0800 From: Zhenzhong Duan <zhenzhong.duan@...il.com> To: linux-kernel@...r.kernel.org, virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org Cc: netdev@...r.kernel.org, pbonzini@...hat.com, sean.j.christopherson@...el.com, vkuznets@...hat.com, wanpengli@...cent.com, jmattson@...gle.com, joro@...tes.org, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, mst@...hat.com, jasowang@...hat.com, Zhenzhong Duan <zhenzhong.duan@...il.com> Subject: [PATCH 2/2] KVM: not link irqfd with a fake IRQ bypass producer In case failure to setup Post interrupt for an IRQ, it make no sense to assign irqfd->producer to the producer. This change makes code more robust. Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...il.com> --- arch/x86/kvm/x86.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index ce856e0..277e961 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -10683,13 +10683,14 @@ int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, container_of(cons, struct kvm_kernel_irqfd, consumer); int ret; - irqfd->producer = prod; kvm_arch_start_assignment(irqfd->kvm); ret = kvm_x86_ops.update_pi_irte(irqfd->kvm, prod->irq, irqfd->gsi, 1); if (ret) kvm_arch_end_assignment(irqfd->kvm); + else + irqfd->producer = prod; return ret; } -- 1.8.3.1
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