KVM: Do not calculate linear rip in emulation failure report

If we're not gonna do anything (case in which failure is already
reported), we do not need to even bother with calculating the linear rip.
Signed-off-by: NGlauber Costa <gcosta@redhat.com>
Signed-off-by: NAvi Kivity <avi@qumranet.com>

arch/x86/kvm/x86.c

@@ -2081,11 +2081,11 @@ void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
 	unsigned long rip = vcpu->arch.rip;
 	unsigned long rip_linear;
 
-	rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
-
 	if (reported)
 		return;
 
+	rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
+
 	emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
 
 	printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",