Patch "genirq: Fix can_request_irq() for IRQs without an action" has been added to the 3.0-stable tree

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This is a note to let you know that I've just added the patch titled

    genirq: Fix can_request_irq() for IRQs without an action

to the 3.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     genirq-fix-can_request_irq-for-irqs-without-an-action.patch
and it can be found in the queue-3.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 2779db8d37d4b542d9ca2575f5f178dbeaca6c86 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Date: Fri, 28 Jun 2013 02:40:30 +0100
Subject: genirq: Fix can_request_irq() for IRQs without an action

From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>

commit 2779db8d37d4b542d9ca2575f5f178dbeaca6c86 upstream.

Commit 02725e7471b8 ('genirq: Use irq_get/put functions'),
inadvertently changed can_request_irq() to return 0 for IRQs that have
no action.  This causes pcibios_lookup_irq() to select only IRQs that
already have an action with IRQF_SHARED set, or to fail if there are
none.  Change can_request_irq() to return 1 for IRQs that have no
action (if the first two conditions are met).

Reported-by: Bjarni Ingi Gislason <bjarniig@xxxxxxxxx>
Tested-by: Bjarni Ingi Gislason <bjarniig@xxxxxxxxx> (against 3.2)
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Cc: 709647@xxxxxxxxxxxxxxx
Link: http://bugs.debian.org/709647
Link: http://lkml.kernel.org/r/1372383630.23847.40.camel@xxxxxxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 kernel/irq/manage.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -536,9 +536,9 @@ int can_request_irq(unsigned int irq, un
 		return 0;
 
 	if (irq_settings_can_request(desc)) {
-		if (desc->action)
-			if (irqflags & desc->action->flags & IRQF_SHARED)
-				canrequest =1;
+		if (!desc->action ||
+		    irqflags & desc->action->flags & IRQF_SHARED)
+			canrequest = 1;
 	}
 	irq_put_desc_unlock(desc, flags);
 	return canrequest;


Patches currently in stable-queue which might be from ben@xxxxxxxxxxxxxxx are

queue-3.0/genirq-fix-can_request_irq-for-irqs-without-an-action.patch
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