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

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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>
This commit is contained in:
Prarit Bhargava 2005-08-02 10:08:00 -07:00 committed by Tony Luck
parent 12aaa0855b
commit c1ffb910f7
1 changed files with 10 additions and 8 deletions
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18
arch/ia64/sn/kernel/io_init.c
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@ -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);