From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Wed, 3 Sep 2014 14:21:32 +0000 (+0200)
Subject: KVM: s390: unintended fallthrough for external call
X-Git-Tag: firefly_0821_release~3679^2~1366
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=68249f03d07ff212ee1b0170450985d896378f88;p=firefly-linux-kernel-4.4.55.git

KVM: s390: unintended fallthrough for external call

commit f346026e55f1efd3949a67ddd1dcea7c1b9a615e upstream.

We must not fallthrough if the conditions for external call are not met.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 5c948177529e..bc79ab00536f 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -71,6 +71,7 @@ static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
 			return 0;
 		if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
 			return 1;
+		return 0;
 	case KVM_S390_INT_EMERGENCY:
 		if (psw_extint_disabled(vcpu))
 			return 0;