linux-kernel - [PATCH 3.13.y-ckt 050/122] xen/events: Set irq_info->evtchn before binding the channel to CPU in __startup

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Message-Id: <1434580149-3095-51-git-send-email-kamal@canonical.com>
Date:	Wed, 17 Jun 2015 15:27:57 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 050/122] xen/events: Set irq_info->evtchn before binding the channel to CPU in __startup_pirq()

3.13.11-ckt22 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Boris Ostrovsky <boris.ostrovsky@...cle.com>

commit 16e6bd5970c88a2ac018b84a5f1dd5c2ff1fdf2c upstream.

.. because bind_evtchn_to_cpu(evtchn, cpu) will map evtchn to
'info' and pass 'info' down to xen_evtchn_port_bind_to_cpu().

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
Tested-by: Annie Li <annie.li@...cle.com>
Signed-off-by: David Vrabel <david.vrabel@...rix.com>
[ kamal: backport to 3.13-stable: applied to drivers/xen/events.c; context ]
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/xen/events.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 4035e83..83d5d42 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -611,8 +611,8 @@ static unsigned int __startup_pirq(unsigned int irq)
 	pirq_query_unmask(irq);
 
 	evtchn_to_irq[evtchn] = irq;
-	bind_evtchn_to_cpu(evtchn, 0);
 	info->evtchn = evtchn;
+	bind_evtchn_to_cpu(evtchn, 0);
 
 out:
 	unmask_evtchn(evtchn);
-- 
1.9.1

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