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Return the spurious interrupt vector (IRQ7 or IRQ15) if the atpic cannot

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find any unmasked pin with an interrupt asserted.

Reviewed by:	tychon
CR:		https://reviews.freebsd.org/D669
MFC after:	1 week
This commit is contained in:
Neel Natu 2014-08-23 21:16:26 +00:00
parent acc1741c58
commit 7a244722d1
1 changed files with 8 additions and 2 deletions
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10
sys/amd64/vmm/io/vatpic.c
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@ -500,13 +500,19 @@ vatpic_pending_intr(struct vm *vm, int *vecptr)
VATPIC_LOCK(vatpic);
pin = vatpic_get_highest_irrpin(atpic);
if (pin == -1)
pin = 7;
if (pin == 2) {
atpic = &vatpic->atpic[1];
pin = vatpic_get_highest_irrpin(atpic);
}
/*
* If there are no pins active at this moment then return the spurious
* interrupt vector instead.
*/
if (pin == -1)
pin = 7;
KASSERT(pin >= 0 && pin <= 7, ("%s: invalid pin %d", __func__, pin));
*vecptr = atpic->irq_base + pin;
VATPIC_UNLOCK(vatpic);