tree c32e2452c7269e97ef001eb8f8428a106e9434cf
parent e1e575f6b026734be3b1f075e780e91ab08ca541
author Paolo Bonzini <pbonzini@redhat.com> 1477481756 +0200
committer Paolo Bonzini <pbonzini@redhat.com> 1477483611 +0200

KVM: fix OOPS on flush_work

The conversion done by commit 3706feacd007 ("KVM: Remove deprecated
create_singlethread_workqueue") is broken.  It flushes a single work
item &irqfd->shutdown instead of all of them, and even worse if there
is no irqfd on the list then you get a NULL pointer dereference.
Revert the virt/kvm/eventfd.c part of that patch; to avoid the
deprecated function, just allocate our own workqueue---it does
not even have to be unbound---with alloc_workqueue.

Fixes: 3706feacd007
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>