[Xen-devel] [PATCH] x86: Initialize the affinity field after assigning the vector.

["Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>]

x86: Initialize the affinity field after assigning the vector.
 
To avoid strange output from debug-key "i", desc->affinity should
be the subset of the cfg->domain basically, so copy cfg->domain to 
desc->affinity after assigning vector for the irq..
 
Signed-off-by: Xiantao Zhang <xiantao.zhang@xxxxxxxxx>
 
diff -r 3bbe9ab2202b xen/arch/x86/irq.c
--- a/xen/arch/x86/irq.c    Wed Oct 21 09:23:10 2009 +0100
+++ b/xen/arch/x86/irq.c    Wed Oct 21 17:47:50 2009 +0800
@@ -419,13 +419,16 @@ int assign_irq_vector(int irq)
     int ret;
     unsigned long flags;
     struct irq_cfg *cfg = &irq_cfg[irq];
+    struct irq_desc *desc = irq_to_desc(irq);
     
     BUG_ON(irq >= nr_irqs || irq <0);
 
     spin_lock_irqsave(&vector_lock, flags);
     ret = __assign_irq_vector(irq, cfg, TARGET_CPUS);
-    if (!ret)
+    if (!ret) {
         ret = cfg->vector;
+        cpus_copy(desc->affinity, cfg->domain);
+    }
     spin_unlock_irqrestore(&vector_lock, flags);
     return ret;
 }

initialize-affinity-field-after-affigning-vector.patch
Description: initialize-affinity-field-after-affigning-vector.patch

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