linux-kernel - [PATCH 28 of 31] xen: make sure retriggered events are set pending

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Date:	Mon, 17 Mar 2008 16:37:19 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Ian Campbell <ijc@...lion.org.uk>
Subject: [PATCH 28 of 31] xen: make sure retriggered events are set pending

retrigger_dynirq() was incomplete, and didn't properly set the event
to be pending again.  It doesn't seem to actually get used.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 arch/x86/xen/events.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/x86/xen/events.c b/arch/x86/xen/events.c
--- a/arch/x86/xen/events.c
+++ b/arch/x86/xen/events.c
@@ -601,10 +601,16 @@
 static int retrigger_dynirq(unsigned int irq)
 {
 	int evtchn = evtchn_from_irq(irq);
+	struct shared_info *sh = HYPERVISOR_shared_info;
 	int ret = 0;
 
 	if (VALID_EVTCHN(evtchn)) {
-		set_evtchn(evtchn);
+		int masked;
+
+		masked = sync_test_and_set_bit(evtchn, sh->evtchn_mask);
+		sync_set_bit(evtchn, sh->evtchn_pending);
+		if (!masked)
+			unmask_evtchn(evtchn);
 		ret = 1;
 	}
 


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