[POWERPC] Do not write virq back to PCI config space

- Drivers will not rely on the PCI config space value, as they've
  already been conditioned to rely on the irq field in "struct pci_dev".

- The virq value may not be < 256 as it has been remapped.

- The PCI config space should reflect the hardware configuration, which
  is not being changed.  We are only creating a virtual irq mapping that
  exists in the kernel only. One would never expect the PCI hardware to
  generate the "virq" interrupt.

Signed-off-by: Michal Ostrowski <mostrows@watson.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 0 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index c54f3639c5ad..d8ef2e100505 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -1450,7 +1450,6 @@ int pci_read_irq_line(struct pci_dev *pci_dev)
                 return -1;
         }
         pci_dev->irq = virq;
-        pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, virq);
 
         return 0;
 }