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kvm: Fix kvm_get_page_retry_io __gup retval check 

Confusion around -EBUSY and zero (inside a BUG_ON no less).

Reported-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andres Lagar-Cavilla <andreslc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andres Lagar-Cavilla 2014-09-25 15:26:50 -07:00 committed by Paolo Bonzini
parent 00c027db0c
commit bb0ca6acd4
1 changed files with 1 additions and 1 deletions
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2
virt/kvm/kvm_main.c
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@ -1146,7 +1146,7 @@ int kvm_get_user_page_io(struct task_struct *tsk, struct mm_struct *mm,
npages = __get_user_pages(tsk, mm, addr, 1, flags, pagep, NULL,
&locked);
if (!locked) {
VM_BUG_ON(npages != -EBUSY);
VM_BUG_ON(npages);
if (!pagep)
return 0;