Merge 2.4.x sparc64 PCI IRQ routing fixes into 2.5

arch/sparc64/kernel/pci_common.c

@@ -571,7 +571,7 @@ static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt
 	struct pci_pbm_info *pbm = dev_pcp->pbm;
 	struct linux_prom_pci_registers *pregs = dev_pcp->prom_regs;
 	unsigned int hi, mid, lo, irq;
-	int i, num_intmap;
+	int i, num_intmap, map_slot;
 
 	if (pbm->num_pbm_intmap == 0)
 		return 0;
@@ -579,6 +579,7 @@ static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt
 	intmap = &pbm->pbm_intmap[0];
 	intmask = &pbm->pbm_intmask;
 	num_intmap = pbm->num_pbm_intmap;
+	map_slot = 0;
 
 	/* If we are underneath a PCI bridge, use PROM register
 	 * property of the parent bridge which is closest to
@@ -639,11 +640,21 @@ static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt
 				printk("pci_intmap_match: Trying to recover.\n");
 				return 0;
 			}
+
+			if (pdev->bus->self != bus_dev)
+				map_slot = 1;
 		} else {
 			pregs = bus_pcp->prom_regs;
+			map_slot = 1;
 		}
 	}
 
+	if (map_slot) {
+		*interrupt = ((*interrupt
+			       - 1
+			       + PCI_SLOT(pdev->devfn)) & 0x3) + 1;
+	}
+
 	hi   = pregs->phys_hi & intmask->phys_hi;
 	mid  = pregs->phys_mid & intmask->phys_mid;
 	lo   = pregs->phys_lo & intmask->phys_lo;
@@ -655,6 +666,9 @@ static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt
 		    intmap[i].phys_lo  == lo	&&
 		    intmap[i].interrupt == irq) {
 			*interrupt = intmap[i].cinterrupt;
+			printk("PCI-IRQ: Routing bus[%2x] slot[%2x] map[%d] to INO[%02x]\n",
+			       pdev->bus->number, PCI_SLOT(pdev->devfn),
+			       map_slot, *interrupt);
 			return 1;
 		}
 	}
@@ -720,20 +734,6 @@ static void __init pdev_fixup_irq(struct pci_dev *pdev)
 		goto have_irq;
 	}
 
-	/* Firmware gets quad-hme interrupts property totally
-	 * wrong.  It is 4 EBUS+HME devices behind a Digital bridge.
-	 * For each of the 4 instances the EBUS has interrupt property
-	 * '1' and the HME has interrupt property '2'.  So we have to
-	 * fix this up.
-	 */
-	if (!strcmp(pcp->prom_name, "SUNW,qfe") ||
-	    !strcmp(pcp->prom_name, "qfe")) {
-		if (PCI_SLOT(pdev->devfn) & ~3)
-			BUG();
-
-		prom_irq = PCI_SLOT(pdev->devfn) + 1;
-	}
-
 	/* Can we find a matching entry in the interrupt-map? */
 	if (pci_intmap_match(pdev, &prom_irq)) {
 		pdev->irq = p->irq_build(pbm, pdev, (portid << 6) | prom_irq);