[IA64]: SN fix bus->sysdata pointer and memory cleanups

The main issue is that bus_fixup calls may potentially call
functions that require a valid bus->sysdata pointer.  Since
this is the case, we must set the bus->sysdata pointer before
calling the bus_fixup functions.  The remaining changes are
simple fixes to make sure memory is cleaned up in the function.

Signed-off-by: Prarit Bhargava <prarit@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index a6649baf629a205eb190d16745b92e176337c448..7566a97b0ce16c3e444b1a36fbdd4fc76e6704e1 100644 (file)
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -322,7 +322,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
        struct pci_controller *controller;
        struct pcibus_bussoft *prom_bussoft_ptr;
        struct hubdev_info *hubdev_info;
-       void *provider_soft;
+       void *provider_soft = NULL;
        struct sn_pcibus_provider *provider;
 
        status = sal_get_pcibus_info((u64) segment, (u64) busnum,
@@ -338,7 +338,7 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
        if (bus == NULL) {
                bus = pci_scan_bus(busnum, &pci_root_ops, controller);
                if (bus == NULL)
-                       return; /* error, or bus already scanned */
+                       goto error_return; /* error, or bus already scanned */
                bus->sysdata = NULL;
        }
 
@@ -351,28 +351,30 @@ void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
         */
 
        if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
-               return;         /* unsupported asic type */
+               goto error_return; /* unsupported asic type */
 
        if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
                goto error_return; /* no further fixup necessary */
 
        provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
        if (provider == NULL)
-               return;         /* no provider registerd for this asic */
+               goto error_return; /* no provider registerd for this asic */
 
-       provider_soft = NULL;
+       bus->sysdata = controller;
        if (provider->bus_fixup)
                provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr, controller);
 
-       if (provider_soft == NULL)
-               return;         /* fixup failed or not applicable */
+       if (provider_soft == NULL) {
+               /* fixup failed or not applicable */
+               bus->sysdata = NULL;
+               goto error_return;
+       }
 
        /*
         * Generic bus fixup goes here.  Don't reference prom_bussoft_ptr
         * after this point.
         */
 
-       bus->sysdata = controller;
        PCI_CONTROLLER(bus)->platform_data = provider_soft;
        nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
        cnode = nasid_to_cnodeid(nasid);