linux-kernel - [PATCH] genirq: Fix bad IRQ_ONSHOT in forced IRQ setting

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Message-Id: <1442474027-10839-1-git-send-email-okuno.kohji@jp.panasonic.com>
Date:	Thu, 17 Sep 2015 16:13:47 +0900
From:	Kohji Okuno <okuno.kohji@...panasonic.com>
To:	tglx@...utronix.de
Cc:	linux-kernel@...r.kernel.org,
	Kohji Okuno <okuno.kohji@...panasonic.com>
Subject: [PATCH] genirq: Fix bad IRQ_ONSHOT in forced IRQ setting

If handler and thread_fn have valid function pointers for each
in request_thread_irq(), IRQF_ONESHOT is set unnecessarily in
irq_setup_forces_threading() in case of threadirqs.
As this result, the IRQ handler will not be called.

Signed-off-by: Kohji Okuno <okuno.kohji@...panasonic.com>
---
 kernel/irq/manage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index f9a59f6..759ce0f 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -991,12 +991,12 @@ static void irq_setup_forced_threading(struct irqaction *new)
 	if (new->flags & (IRQF_NO_THREAD | IRQF_PERCPU | IRQF_ONESHOT))
 		return;
 
-	new->flags |= IRQF_ONESHOT;
 
 	if (!new->thread_fn) {
 		set_bit(IRQTF_FORCED_THREAD, &new->thread_flags);
 		new->thread_fn = new->handler;
 		new->handler = irq_default_primary_handler;
+		new->flags |= IRQF_ONESHOT;
 	}
 }
 
-- 
1.9.1

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