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kvm: free resources after canceling async_pf

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When we cancel 'async_pf_execute()', we should behave as if the work was
never scheduled in 'kvm_setup_async_pf()'.
Fixes a bug when we can't unload module because the vm wasn't destroyed.

Signed-off-by: Radim Krčmář <[email protected]>
Reviewed-by: Paolo Bonzini <[email protected]>
Reviewed-by: Gleb Natapov <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
This commit is contained in:
Radim Krčmář 2013-09-04 22:32:23 +02:00 • committed by Gleb Natapov
commit 28b441e240
1 changed files with 4 additions and 1 deletions
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5
virt/kvm/async_pf.c
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@ -101,8 +101,11 @@ void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu)
typeof(*work), queue);
cancel_work_sync(&work->work);
list_del(&work->queue);
if (!work->done) /* work was canceled */
if (!work->done) { /* work was canceled */
mmdrop(work->mm);
kvm_put_kvm(vcpu->kvm); /* == work->vcpu->kvm */
kmem_cache_free(async_pf_cache, work);
}
}
spin_lock(&vcpu->async_pf.lock);