[POWERPC] Make pci_read_irq_line the default

This patch reworks the way IRQs are fixed up on PCI for arch powerpc.

It makes pci_read_irq_line() called by default in the PCI code for
devices that are probed, and add an optional per-device fixup in
ppc_md for platforms that really need to correct what they obtain
from pci_read_irq_line().

It also removes ppc_md.irq_bus_setup which was only used by pSeries
and should not be needed anymore.

I've also removed the pSeries s7a workaround as it can't work with
the current interrupt code anyway. I'm trying to get one of these
machines working so I can test a proper fix for that problem.

I also haven't updated the old-style fixup code from 85xx_cds.c
because it's actually buggy :) It assigns pci_dev->irq hard coded
numbers which is no good with the new IRQ mapping code. It should
at least use irq_create_mapping(NULL, hard_coded_number); and possibly
also set_irq_type() to set them as level low.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 1 insertions, 2 deletions

diff --git a/include/asm-powerpc/machdep.h b/include/asm-powerpc/machdep.h
index dac90dc341cb..3810f131901c 100644
--- a/include/asm-powerpc/machdep.h
+++ b/include/asm-powerpc/machdep.h
@@ -86,7 +86,6 @@ struct machdep_calls {
         void            (*tce_flush)(struct iommu_table *tbl);
         void            (*iommu_dev_setup)(struct pci_dev *dev);
         void            (*iommu_bus_setup)(struct pci_bus *bus);
-        void            (*irq_bus_setup)(struct pci_bus *bus);
 #endif /* CONFIG_PPC64 */
 
         int             (*probe)(void);
@@ -106,6 +105,7 @@ struct machdep_calls {
         /* Called after scanning the bus, before allocating resources */
         void            (*pcibios_fixup)(void);
         int             (*pci_probe_mode)(struct pci_bus *);
+        void            (*pci_irq_fixup)(struct pci_dev *dev);
 
         void            (*restart)(char *cmd);
         void            (*power_off)(void);
diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h
index 1115756c79f9..8894d1d4226b 100644
--- a/include/asm-powerpc/ppc-pci.h
+++ b/include/asm-powerpc/ppc-pci.h
@@ -47,7 +47,6 @@ unsigned long get_phb_buid (struct device_node *);
 
 /* From pSeries_pci.h */
 extern void pSeries_final_fixup(void);
-extern void pSeries_irq_bus_setup(struct pci_bus *bus);
 
 extern unsigned long pci_probe_only;