diff options
| -rw-r--r-- | arch/x86/kvm/lapic.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 8b90a537f6ad..bc56775426c9 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -657,7 +657,7 @@ static u8 count_vectors(void *bitmap) bool __kvm_apic_update_irr(unsigned long *pir, void *regs, int *max_irr) { - unsigned long pir_vals[NR_PIR_WORDS]; + unsigned long pir_vals[NR_PIR_WORDS], pending = 0; u32 *__pir = (void *)pir_vals; u32 i, vec; u32 irr_val, prev_irr_val; @@ -668,6 +668,13 @@ bool __kvm_apic_update_irr(unsigned long *pir, void *regs, int *max_irr) for (i = 0; i < NR_PIR_WORDS; i++) { pir_vals[i] = READ_ONCE(pir[i]); + pending |= pir_vals[i]; + } + + if (!pending) + return false; + + for (i = 0; i < NR_PIR_WORDS; i++) { if (!pir_vals[i]) continue; |