linux-kernel - [PATCH] genirq: handle shared irqs in handle_nested

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Message-Id: <1288288718-1188-1-git-send-email-rabin@rab.in>
Date:	Thu, 28 Oct 2010 23:28:38 +0530
From:	Rabin Vincent <rabin@....in>
To:	tglx@...utronix.de
Cc:	linux-kernel@...r.kernel.org, Rabin Vincent <rabin@....in>
Subject: [PATCH] genirq: handle shared irqs in handle_nested_irq()

Allow shared irqs to work when nested threads are used for handling
threaded interrupts.

Signed-off-by: Rabin Vincent <rabin@....in>
---
 kernel/irq/chip.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index baa5c4a..94a45a9 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -418,8 +418,8 @@ static inline void unmask_irq(struct irq_desc *desc)
 void handle_nested_irq(unsigned int irq)
 {
 	struct irq_desc *desc = irq_to_desc(irq);
+	irqreturn_t action_ret = IRQ_NONE;
 	struct irqaction *action;
-	irqreturn_t action_ret;
 
 	might_sleep();
 
@@ -434,7 +434,10 @@ void handle_nested_irq(unsigned int irq)
 	desc->status |= IRQ_INPROGRESS;
 	raw_spin_unlock_irq(&desc->lock);
 
-	action_ret = action->thread_fn(action->irq, action->dev_id);
+	do {
+		action_ret |= action->thread_fn(action->irq, action->dev_id);
+		action = action->next;
+	} while (action);
 	if (!noirqdebug)
 		note_interrupt(irq, desc, action_ret);
 
-- 
1.7.2.3

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