lkml.org 
[lkml]   [2013]   [May]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RESEND][PATCH 1/1] genirq: outline lazy disable in kerneldoc of irq_disable function.
Date
comment taken from changelog of d209a699a0b975ad

Signed-off-by: Andreas Fenkart <andreas.fenkart@streamunlimited.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


\
 
 \ /
  Last update: 2013-05-14 23:41    [W:0.039 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site