From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Borntraeger Subject: [PATCH 1/1] KVM: s390: clear floating interrupt bitmap and parameters Date: Mon, 22 Jun 2015 13:20:12 +0200 Message-ID: <1434972012-68554-2-git-send-email-borntraeger@de.ibm.com> References: <1434972012-68554-1-git-send-email-borntraeger@de.ibm.com> Return-path: In-Reply-To: <1434972012-68554-1-git-send-email-borntraeger@de.ibm.com> Sender: stable-owner@vger.kernel.org List-Archive: List-Post: To: Paolo Bonzini Cc: Alexander Graf , KVM , Cornelia Huck , Jens Freimann , linux-s390 , stable@vger.kernel.org, #@tuxmaker.boeblingen.de.ibm.com, 4.1@tuxmaker.boeblingen.de.ibm.com, Christian Borntraeger List-ID: From: Jens Freimann commit 6d3da24141 ("KVM: s390: deliver floating interrupts in order of priority") introduced a regression for the reset handling. We don't clear the bitmap of pending floating interrupts and interrupt parameters. This could result in stale interrupts even after a reset. Let's fix this by clearing the pending bitmap and the parameters for service and machine check interrupts. Cc: stable@vger.kernel.org # 4.1 Signed-off-by: Jens Freimann Signed-off-by: Christian Borntraeger --- arch/s390/kvm/interrupt.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index 322ef9c..480b975 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -1621,6 +1621,9 @@ void kvm_s390_clear_float_irqs(struct kvm *kvm) int i; spin_lock(&fi->lock); + fi->pending_irqs = 0; + memset(&fi->srv_signal, 0, sizeof(fi->srv_signal)); + memset(&fi->mchk, 0, sizeof(fi->mchk)); for (i = 0; i < FIRQ_LIST_COUNT; i++) clear_irq_list(&fi->lists[i]); for (i = 0; i < FIRQ_MAX_COUNT; i++) -- 2.3.0