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>
This commit is contained in:
Jens Freimann 2012-02-06 10:59:05 +01:00 committed by Avi Kivity
parent 151104a7b3
commit 24a13044a8

View File

@ -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 */