[Xen-devel] [PATCH v4 3/6] xen/arm: do not add a second irq to the LRs if one is already present

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

When the guest re-enable IRQs, do not add guest IRQs to LRs twice.

Suggested-by: Julien Grall <julien.grall@xxxxxxxxxx>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/vgic.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/arm/vgic.c b/xen/arch/arm/vgic.c
index b449f45..f2f1702 100644
--- a/xen/arch/arm/vgic.c
+++ b/xen/arch/arm/vgic.c
@@ -370,7 +370,7 @@ static void vgic_enable_irqs(struct vcpu *v, uint32_t r, 
int n)
         irq = i + (32 * n);
         p = irq_to_pending(v, irq);
         set_bit(GIC_IRQ_GUEST_ENABLED, &p->status);
-        if ( !list_empty(&p->inflight) )
+        if ( !list_empty(&p->inflight) && !test_bit(GIC_IRQ_GUEST_VISIBLE, 
&p->status) )
             gic_set_guest_irq(v, irq, GICH_LR_PENDING, p->priority);
         i++;
     }
-- 
1.7.10.4


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