linux-kernel - [PATCH V2] irq: enable all irqs unconditionally in irq

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Date:	Tue, 13 Aug 2013 19:20:56 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	<tglx@...utronix.de>
CC:	<linux-kernel@...r.kernel.org>, <swarren@...dia.com>,
	<rjw@...k.pl>, Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH V2] irq: enable all irqs unconditionally in irq_resume

When system enters into suspend, it disable all irqs in single
function call. This disables EARLY_RESUME irqs also along with
normal irqs.

The EARLY_RESUME irqs get enabled in sys_core_ops->resume and
non-EARLY_RESUME irqs get enabled in normal system resume path.

When suspend_noirq failed or suspend is aborted for any reason,
the EARLY_RESUME irqs do not get enabled as sys_core_ops->resume()
call did not happen. It only enables the non-EARLY_RESUME irqs in normal
disable for remaining life of system.

Enable all irqs unconditionally in normal irq_resume() regardless of
EARLY_RESUME irqs have been already enabled or not.

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
Acked-by-and-tested-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
---
Creating this patch based on disucssion on patch
 [PATCH] irq: enable suspended EARLY_RESUME irqs forcefully if not resumed

Making simple change as susggested by Thomas.

 kernel/irq/pm.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c
index cb228bf..abcd6ca 100644
--- a/kernel/irq/pm.c
+++ b/kernel/irq/pm.c
@@ -50,7 +50,7 @@ static void resume_irqs(bool want_early)
 		bool is_early = desc->action &&
 			desc->action->flags & IRQF_EARLY_RESUME;

-		if (is_early != want_early)
+		if (!is_early && want_early)
 			continue;

 		raw_spin_lock_irqsave(&desc->lock, flags);
-- 
1.7.1.1

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