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authorJens Freimann <jfrei@linux.vnet.ibm.com>2012-02-06 10:59:05 +0100
committerAvi Kivity <avi@redhat.com>2012-03-08 14:10:16 +0200
commit24a13044a84be51a6a4885a72ac9d5f4ed0742d0 (patch)
tree7dcd606daff06c71b2eed197683d4ddd1b4235bc /arch/s390/kvm
parent151104a7b3a82f9c56d636595ae58084049d2559 (diff)
downloadblackbird-op-linux-24a13044a84be51a6a4885a72ac9d5f4ed0742d0.tar.gz
blackbird-op-linux-24a13044a84be51a6a4885a72ac9d5f4ed0742d0.zip
KVM: s390: ignore sigp stop overinitiative
In __inject_sigp_stop() do nothing when the CPU is already in stopped state. Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/s390/kvm')
-rw-r--r--arch/s390/kvm/sigp.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
index c703b1cbb0aa..f3d5cc297012 100644
--- a/arch/s390/kvm/sigp.c
+++ b/arch/s390/kvm/sigp.c
@@ -160,12 +160,15 @@ static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
inti->type = KVM_S390_SIGP_STOP;
spin_lock_bh(&li->lock);
+ if ((atomic_read(li->cpuflags) & CPUSTAT_STOPPED))
+ goto out;
list_add_tail(&inti->list, &li->list);
atomic_set(&li->active, 1);
atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
li->action_bits |= action;
if (waitqueue_active(&li->wq))
wake_up_interruptible(&li->wq);
+out:
spin_unlock_bh(&li->lock);
return 0; /* order accepted */
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