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[2/2] arm64: irq: Notify affinity change when migrating IRQs during hotplug

Message ID 1408553988-63924-2-git-send-email-lina.iyer@linaro.org
State New
Headers show

Commit Message

Lina Iyer Aug. 20, 2014, 4:59 p.m. UTC 
From: Praveen Chidambaram <pchidamb@codeaurora.org>

Hotplug causes IRQs affine to a core that is being taken down to migrate
to an online core. This is done by directly calling the irq_set_affinity
associated with the irq_chip structure. Instead using the
irq_set_affinity_locked() api lets the notifications bubble through.

Signed-off-by: Praveen Chidambaram <pchidamb@codeaurora.org>
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
---
 arch/arm64/kernel/irq.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)
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Patch

diff --git a/arch/arm64/kernel/irq.c b/arch/arm64/kernel/irq.c
index 0f08dfd..c623032 100644
--- a/arch/arm64/kernel/irq.c
+++ b/arch/arm64/kernel/irq.c
@@ -87,7 +87,6 @@  static bool migrate_one_irq(struct irq_desc *desc)
 {
 	struct irq_data *d = irq_desc_get_irq_data(desc);
 	const struct cpumask *affinity = d->affinity;
-	struct irq_chip *c;
 	bool ret = false;
 
 	/*
@@ -106,12 +105,8 @@  static bool migrate_one_irq(struct irq_desc *desc)
 	 * selected as the target CPU otherwise
 	 */
 	affinity = cpu_online_mask;
-	c = irq_data_get_irq_chip(d);
-	if (!c->irq_set_affinity)
-		pr_debug("IRQ%u: unable to set affinity\n", d->irq);
-	else if (c->irq_set_affinity(d, affinity, true) == IRQ_SET_MASK_OK && ret)
-		cpumask_copy(d->affinity, affinity);
-
+	ret = (irq_set_affinity_locked(d, affinity, true) == IRQ_SET_MASK_OK)
+			&& ret;
 	return ret;
 }