parisc: fix wrong assumption about bus->self

Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> posted a patch series
to linux-pci to fix a wrong assumption about pci_bus->self==NULL for
all PCI host bus controllers. While PARISC platforms to not behave
this way, I prefer to have the code consistent across architectures.
The following patch replaces pci_bus->self with pci_bus->parent when
used as a test to check for "root bus controller".

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>

3 files changed, 7 insertions, 8 deletions

diff --git a/drivers/parisc/dino.c b/drivers/parisc/dino.c
index d539d9df88e7..f79266cd00e5 100644
--- a/drivers/parisc/dino.c
+++ b/drivers/parisc/dino.c
@@ -587,7 +587,7 @@ dino_fixup_bus(struct pci_bus *bus)
                         bus->resource[i+1] = &res[i];
                 }
 
-        } else if(bus->self) {
+        } else if (bus->parent) {
                 int i;
 
                 pci_read_bridge_bases(bus);
diff --git a/drivers/parisc/iosapic.c b/drivers/parisc/iosapic.c
index 0797659ee016..1cdfdea5d7ef 100644
--- a/drivers/parisc/iosapic.c
+++ b/drivers/parisc/iosapic.c
@@ -487,7 +487,7 @@ iosapic_xlate_pin(struct iosapic_info *isi, struct pci_dev *pcidev)
         }
 
         /* Check if pcidev behind a PPB */
-        if (NULL != pcidev->bus->self) {
+        if (pcidev->bus->parent) {
                 /* Convert pcidev INTR_PIN into something we
                 ** can lookup in the IRT.
                 */
@@ -523,10 +523,9 @@ iosapic_xlate_pin(struct iosapic_info *isi, struct pci_dev *pcidev)
 #endif /* PCI_BRIDGE_FUNCS */
 
                 /*
-                ** Locate the host slot the PPB nearest the Host bus
-                ** adapter.
-                */
-                while (NULL != p->parent->self)
+                 * Locate the host slot of the PPB.
+                 */
+                while (p->parent->parent)
                         p = p->parent;
 
                 intr_slot = PCI_SLOT(p->self->devfn);
diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c
index d8233de8c75d..59fbbf128365 100644
--- a/drivers/parisc/lba_pci.c
+++ b/drivers/parisc/lba_pci.c
@@ -644,7 +644,7 @@ lba_fixup_bus(struct pci_bus *bus)
         ** Properly Setup MMIO resources for this bus.
         ** pci_alloc_primary_bus() mangles this.
         */
-        if (bus->self) {
+        if (bus->parent) {
                 int i;
                 /* PCI-PCI Bridge */
                 pci_read_bridge_bases(bus);
@@ -802,7 +802,7 @@ lba_fixup_bus(struct pci_bus *bus)
 ** Can't fixup here anyway....garr...
 */
         if (fbb_enable) {
-                if (bus->self) {
+                if (bus->parent) {
                         u8 control;
                         /* enable on PPB */
                         (void) pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &control);