linux-kernel - [PATCH] pcf50633: Fix unsafe disable

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Message-ID: <20090509202143.8431.81717.stgit@localhost>
Date:	Sat, 09 May 2009 15:21:43 -0500
From:	Nelson Castillo <arhuaco@...aks-unidos.net>
To:	sameo@...ux.intel.com
Cc:	balajirrao@...nmoko.org, linux-kernel@...r.kernel.org
Subject: [PATCH] pcf50633: Fix unsafe disable_irq

Without this change Openmoko Freerunner (GTA02) bootstrap
will deadlock. As pointed out in other patches this issue is
in the wild since the merge of:

commit 3aa551c9b4c40018f0e261a178e3d25478dc04a9
Author: Thomas Gleixner <tglx@...utronix.de>
Date:   Mon Mar 23 18:28:15 2009 +0100

   genirq: add threaded interrupt handler support

   Add support for threaded interrupt handlers

Signed-off-by: Nelson Castillo <arhuaco@...aks-unidos.net>
---

 drivers/mfd/pcf50633-core.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c
index 7793932..11a6248 100644
--- a/drivers/mfd/pcf50633-core.c
+++ b/drivers/mfd/pcf50633-core.c
@@ -443,7 +443,7 @@ static irqreturn_t pcf50633_irq(int irq, void *data)
 	dev_dbg(pcf->dev, "pcf50633_irq\n");
 
 	get_device(pcf->dev);
-	disable_irq(pcf->irq);
+	disable_irq_nosync(pcf->irq);
 	schedule_work(&pcf->irq_work);
 
 	return IRQ_HANDLED;

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