[IA64] SN: Correctly update smp_affinty mask

On Altix systems, the /proc/irq/nn/smp_affinity mask is not being setup
at device iniitalization, or updated after an interrupt redirection.
This patch resolves those issues.

Signed-off-by: John Keller <jpk@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 15 insertions, 7 deletions

diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 0b49459a878a..8c5bee01eaa2 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -117,7 +117,10 @@ struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
                                        nasid_t nasid, int slice)
 {
         int vector;
+        int cpuid;
+#ifdef CONFIG_SMP
         int cpuphys;
+#endif
         int64_t bridge;
         int local_widget, status;
         nasid_t local_nasid;
@@ -146,7 +149,6 @@ struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
         vector = sn_irq_info->irq_irq;
         /* Free the old PROM new_irq_info structure */
         sn_intr_free(local_nasid, local_widget, new_irq_info);
-        /* Update kernels new_irq_info with new target info */
         unregister_intr_pda(new_irq_info);
 
         /* allocate a new PROM new_irq_info struct */
@@ -160,8 +162,10 @@ struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
                 return NULL;
         }
 
-        cpuphys = nasid_slice_to_cpuid(nasid, slice);
-        new_irq_info->irq_cpuid = cpuphys;
+        /* Update kernels new_irq_info with new target info */
+        cpuid = nasid_slice_to_cpuid(new_irq_info->irq_nasid,
+                                     new_irq_info->irq_slice);
+        new_irq_info->irq_cpuid = cpuid;
         register_intr_pda(new_irq_info);
 
         pci_provider = sn_pci_provider[new_irq_info->irq_bridge_type];
@@ -180,6 +184,7 @@ struct sn_irq_info *sn_retarget_vector(struct sn_irq_info *sn_irq_info,
         call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
 
 #ifdef CONFIG_SMP
+        cpuphys = cpu_physical_id(cpuid);
         set_irq_affinity_info((vector & 0xff), cpuphys, 0);
 #endif
 
@@ -299,6 +304,9 @@ void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
         nasid_t nasid = sn_irq_info->irq_nasid;
         int slice = sn_irq_info->irq_slice;
         int cpu = nasid_slice_to_cpuid(nasid, slice);
+#ifdef CONFIG_SMP
+        int cpuphys;
+#endif
 
         pci_dev_get(pci_dev);
         sn_irq_info->irq_cpuid = cpu;
@@ -311,6 +319,10 @@ void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
         spin_unlock(&sn_irq_info_lock);
 
         register_intr_pda(sn_irq_info);
+#ifdef CONFIG_SMP
+        cpuphys = cpu_physical_id(cpu);
+        set_irq_affinity_info(sn_irq_info->irq_irq, cpuphys, 0);
+#endif
 }
 
 void sn_irq_unfixup(struct pci_dev *pci_dev)
diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c
index 6ffd1f850d41..b3a435fd70fb 100644
--- a/arch/ia64/sn/kernel/msi_sn.c
+++ b/arch/ia64/sn/kernel/msi_sn.c
@@ -136,10 +136,6 @@ int sn_setup_msi_irq(unsigned int irq, struct pci_dev *pdev)
          */
         msg.data = 0x100 + irq;
 
-#ifdef CONFIG_SMP
-        set_irq_affinity_info(irq, sn_irq_info->irq_cpuid, 0);
-#endif
-
         write_msi_msg(irq, &msg);
         set_irq_chip_and_handler(irq, &sn_msi_chip, handle_edge_irq);