1 files changed, 22 insertions, 17 deletions

diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 783eb4323847..2f03e3f52b63 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -21,7 +21,6 @@
 #include <asm/sn/simulator.h>
 #include <asm/sn/tioca_provider.h>
 
-char master_baseio_wid;
 nasid_t master_nasid = INVALID_NASID;   /* Partition Master */
 
 struct slab_info {
@@ -231,11 +230,13 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
 {
         int idx;
         int segment = 0;
-        uint64_t size;
-        struct sn_irq_info *sn_irq_info;
-        struct pci_dev *host_pci_dev;
         int status = 0;
         struct pcibus_bussoft *bs;
+        struct pci_bus *host_pci_bus;
+        struct pci_dev *host_pci_dev;
+        struct sn_irq_info *sn_irq_info;
+        unsigned long size;
+        unsigned int bus_no, devfn;
 
         dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
         if (SN_PCIDEV_INFO(dev) <= 0)
@@ -253,7 +254,7 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
                                      (u64) __pa(SN_PCIDEV_INFO(dev)),
                                      (u64) __pa(sn_irq_info));
         if (status)
-                BUG();          /* Cannot get platform pci device information information */
+                BUG(); /* Cannot get platform pci device information */
 
         /* Copy over PIO Mapped Addresses */
         for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) {
@@ -275,15 +276,20 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
                         dev->resource[idx].parent = &iomem_resource;
         }
 
-        /* set up host bus linkages */
-        bs = SN_PCIBUS_BUSSOFT(dev->bus);
-        host_pci_dev =
-            pci_find_slot(SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32,
-                          SN_PCIDEV_INFO(dev)->
-                          pdi_slot_host_handle & 0xffffffff);
+        /* Using the PROMs values for the PCI host bus, get the Linux
+         * PCI host_pci_dev struct and set up host bus linkages
+         */
+
+        bus_no = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle >> 32;
+        devfn = SN_PCIDEV_INFO(dev)->pdi_slot_host_handle & 0xffffffff;
+        host_pci_bus = pci_find_bus(pci_domain_nr(dev->bus), bus_no);
+        host_pci_dev = pci_get_slot(host_pci_bus, devfn);
+
+        SN_PCIDEV_INFO(dev)->host_pci_dev = host_pci_dev;
         SN_PCIDEV_INFO(dev)->pdi_host_pcidev_info =
-            SN_PCIDEV_INFO(host_pci_dev);
+                                                SN_PCIDEV_INFO(host_pci_dev);
         SN_PCIDEV_INFO(dev)->pdi_linux_pcidev = dev;
+        bs = SN_PCIBUS_BUSSOFT(dev->bus);
         SN_PCIDEV_INFO(dev)->pdi_pcibus_info = bs;
 
         if (bs && bs->bs_asic_type < PCIIO_ASIC_MAX_TYPES) {
@@ -297,6 +303,9 @@ static void sn_pci_fixup_slot(struct pci_dev *dev)
                 SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = sn_irq_info;
                 dev->irq = SN_PCIDEV_INFO(dev)->pdi_sn_irq_info->irq_irq;
                 sn_irq_fixup(dev, sn_irq_info);
+        } else {
+                SN_PCIDEV_INFO(dev)->pdi_sn_irq_info = NULL;
+                kfree(sn_irq_info);
         }
 }
 
@@ -403,11 +412,7 @@ static int __init sn_pci_init(void)
          */
         ia64_max_iommu_merge_mask = ~PAGE_MASK;
         sn_fixup_ionodes();
-        sn_irq = kmalloc(sizeof(struct sn_irq_info *) * NR_IRQS, GFP_KERNEL);
-        if (sn_irq <= 0)
-                BUG();          /* Canno afford to run out of memory. */
-        memset(sn_irq, 0, sizeof(struct sn_irq_info *) * NR_IRQS);
-
+        sn_irq_lh_init();
         sn_init_cpei_timer();
 
 #ifdef CONFIG_PROC_FS