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x86/PCI: VMD: Initialize list item in IRQ disable

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Multiple calls to disable an IRQ would have caused the driver to
dereference a poisoned list item.  This re-initializes the list to allow
multiple requests to disable the IRQ.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by Jon Derrick: <jonathan.derrick@intel.com>
This commit is contained in:
Keith Busch 2016-05-17 11:22:18 -06:00 committed by Bjorn Helgaas
parent ca8a8fabb1
commit 97e9230635
1 changed files with 1 additions and 0 deletions
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arch/x86/pci/vmd.c
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@ -135,6 +135,7 @@ static void vmd_irq_disable(struct irq_data *data)
raw_spin_lock(&list_lock);
list_del_rcu(&vmdirq->node);
INIT_LIST_HEAD_RCU(&vmdirq->node);
raw_spin_unlock(&list_lock);
}