Xen devel - Feb 2011 - [PATCH] 2.6.39 patch for Xen IRQ rework.

It is one single patch that I spotted while trying to make MSI/MSI-X of SR-IOV
devices work under DomU PV guests.


Konrad Rzeszutek Wilk (1):
      xen/irq: Cleanup up the pirq_to_irq for DomU PV PCI passthrough guests as
well.

 drivers/xen/events.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)


diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 975e90f..89987a7 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -766,8 +766,9 @@ int xen_destroy_irq(int irq)
 			printk(KERN_WARNING "unmap irq failed %d\n", rc);
 			goto out;
 		}
-		pirq_to_irq[info->u.pirq.pirq] = -1;
 	}
+	pirq_to_irq[info->u.pirq.pirq] = -1;
+
 	irq_info[irq] = mk_unbound_info();
 
 	xen_free_irq(irq);

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We only did this for PV guests that are xen_initial_domain() but
there is not reason not to do this for other cases. The other
case is only exercised when you pass in a PCI device to a PV guest
_and_ the device in question.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/xen/events.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 975e90f..89987a7 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -766,8 +766,9 @@ int xen_destroy_irq(int irq)
 			printk(KERN_WARNING "unmap irq failed %d\n", rc);
 			goto out;
 		}
-		pirq_to_irq[info->u.pirq.pirq] = -1;
 	}
+	pirq_to_irq[info->u.pirq.pirq] = -1;
+
 	irq_info[irq] = mk_unbound_info();
 
 	xen_free_irq(irq);
-- 
1.7.1


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