[RESEND 1/1] gic: its: Make sure a LPI is discarded before free.

[Zhao Yuanyuan]

Its device will be removed after all events be freed.
Undisarded events can lead to unpredictable behaviar.

Signed-off-by: Zhao Yuanyuan <yuanyuan.zhao@xxxxxxxxxxxxxxxx>
---
 drivers/irqchip/irq-gic-v3-its.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index db20e99..4fee008 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -2572,6 +2572,10 @@ static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq,
 								virq + i);
 		u32 event = its_get_event_id(data);
 
+		/* Discard irq before free */
+		if (irqd_is_activated(d))
+			its_send_discard(its_dev, event);
+
 		/* Mark interrupt index as unused */
 		clear_bit(event, its_dev->event_map.lpi_map);
 
-- 
1.8.3.1