[PATCH V2] KVM:x86:Fix an interrupt injection logic error during PIC interrupt simulation

[Liam Ni]

The input parameter level to the pic_irq_request function indicates
whether there are interrupts to be injected,
a level value of 1 indicates that there are interrupts to be injected,
and a level value of 0 indicates that there are no interrupts to be injected.
And the value of level will be assigned to s->output,
so we should set s->wakeup_needed to true when s->output is true.

Signed-off-by: Liam Ni <zhiguangni01@xxxxxxxxx>
---
 arch/x86/kvm/i8259.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 8dec646e764b..ec9d6ee7d33d 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -567,7 +567,7 @@ static void pic_irq_request(struct kvm *kvm, int level)
 {
    struct kvm_pic *s = kvm->arch.vpic;

-   if (!s->output)
+   if (!s->output && level)
        s->wakeup_needed = true;
    s->output = level;
 }
--
2.34.1