KVM: x86: fix *NULL on invalid low-prio irq
Smatch noticed a NULL dereference in kvm_intr_is_single_vcpu_fast that happens if VM already warned about invalid lowest-priority interrupt. Create a function for common code while fixing it. Fixes: 6228a0da ("KVM: x86: Add lowest-priority support for vt-d posted-interrupts") Reported-by: NDan Carpenter <dan.carpenter@oracle.com> Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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