linux-kernel - [RESEND][PATCH 1/1] genirq: outline lazy disable in kerneldoc of irq

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Date:	Tue, 14 May 2013 23:15:44 +0200
From:	Andreas Fenkart <andreas.fenkart@...eamunlimited.com>
To:	tglx@...utronix.de
Cc:	linux-kernel@...r.kernel.org, rdunlap@...radead.org,
	Andreas Fenkart <andreas.fenkart@...eamunlimited.com>
Subject: [RESEND][PATCH 1/1] genirq: outline lazy disable in kerneldoc of irq_disable function.

comment taken from changelog of d209a699a0b975ad

Signed-off-by: Andreas Fenkart <andreas.fenkart@...eamunlimited.com>
---
 kernel/irq/chip.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index cbd97ce..ba1f076 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -213,6 +213,16 @@ void irq_enable(struct irq_desc *desc)
 	irq_state_clr_masked(desc);
 }
 
+/**
+ *	irq_disable - disable interrupt generation
+ *	@desc:	irq descriptor which should be disabled
+ *
+ *	If the chip does not implement the irq_disable callback, we
+ *	use a lazy disable approach. That means we mark the interrupt
+ *	disabled, but leave the hardware unmasked. If an interrupt
+ *	happens, then the interrupt flow handler masks the line at the
+ *	hardware level and marks it pending.
+ */
 void irq_disable(struct irq_desc *desc)
 {
 	irq_state_set_disabled(desc);
-- 
1.7.10.4

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