To prevent interrupt storms, the fasteoi handler must mask
the interrupt line in oneshot mode. Backported from c69e3758ff56.
---
kernel/irq/chip.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 9671529..2d25c62 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -575,6 +575,9 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
goto out;
}
+ if (desc->status & IRQ_ONESHOT)
+ mask_irq(desc);
+
desc->status |= IRQ_INPROGRESS;
desc->status &= ~IRQ_PENDING;
raw_spin_unlock(&desc->lock);
--
1.7.6.4
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