Revert "[POWERPC] Don't get PCI IRQ from OF for devices with no IRQ"

This reverts commit 41550c5128150175197257b6ceab2cd50dea7b51.

Quoth Ben Herrenschmidt:
 "Please revert this one for now.  It seems to break G5s :( Looks like
  PCI cells inside Apple IO ASICs don't have a PCI_INTERRUPT_LINE set.
  I need to figure out a better fix."

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 6 insertions, 11 deletions

diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 17fcb4842fe5..603dff3ad62a 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -914,17 +914,6 @@ int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
         u8 pin;
         int rc;
 
-        /* We need to first check if the PCI device has a PCI interrupt at all
-         * since we have cases where the device-node might expose non-PCI
-         * interrupts, but the device has no PCI interrupt to it
-         */
-        rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
-        if (rc != 0)
-                return rc;
-        /* No pin, exit */
-        if (pin == 0)
-                return -ENODEV;
-
         /* Check if we have a device node, if yes, fallback to standard OF
          * parsing
          */
@@ -936,6 +925,12 @@ int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
          * interrupt spec.  we assume #interrupt-cells is 1, which is standard
          * for PCI. If you do different, then don't use that routine.
          */
+        rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
+        if (rc != 0)
+                return rc;
+        /* No pin, exit */
+        if (pin == 0)
+                return -ENODEV;
 
         /* Now we walk up the PCI tree */
         lspec = pin;