[IA64] vector-domain - handle assign_irq_vector(AUTO_ASSIGN)

This change fixes a panic when assign_irq_vector(irq) is called with
irq = AUTO_ASSIGN.

Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index 91797c111162..158eafb5f1aa 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -212,9 +212,6 @@ assign_irq_vector (int irq)
         vector = -ENOSPC;
 
         spin_lock_irqsave(&vector_lock, flags);
-        if (irq < 0) {
-                goto out;
-        }
         for_each_online_cpu(cpu) {
                 domain = vector_allocation_domain(cpu);
                 vector = find_unassigned_vector(domain);
@@ -223,6 +220,8 @@ assign_irq_vector (int irq)
         }
         if (vector < 0)
                 goto out;
+        if (irq == AUTO_ASSIGN)
+                irq = vector;
         BUG_ON(__bind_irq_vector(irq, vector, domain));
  out:
         spin_unlock_irqrestore(&vector_lock, flags);