forked from Minki/linux
KVM: fix crash on irqfd deassign
irqfd in kvm used flush_work incorrectly: it assumed that work scheduled previously can't run after flush_work, but since kvm uses a non-reentrant workqueue (by means of schedule_work) we need flush_work_sync to get that guarantee. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reported-by: Jean-Philippe Menil <jean-philippe.menil@univ-nantes.fr> Tested-by: Jean-Philippe Menil <jean-philippe.menil@univ-nantes.fr> Signed-off-by: Avi Kivity <avi@redhat.com>
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@ -90,7 +90,7 @@ irqfd_shutdown(struct work_struct *work)
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* We know no new events will be scheduled at this point, so block
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* until all previously outstanding events have completed
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*/
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flush_work(&irqfd->inject);
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flush_work_sync(&irqfd->inject);
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/*
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* It is now safe to release the object's resources
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