4 files changed, 30 insertions, 3 deletions

diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index b91d7f146175..badf0951d73c 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -185,8 +185,10 @@ static unsigned long pci_parse_of_flags(u32 addr0)
 
 	if (addr0 & 0x02000000) {
 		flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY;
-		flags |= (addr0 >> 22) & PCI_BASE_ADDRESS_MEM_TYPE_64;
 		flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M;
+		if (addr0 & 0x01000000)
+			flags |= IORESOURCE_MEM_64
+				 | PCI_BASE_ADDRESS_MEM_TYPE_64;
 		if (addr0 & 0x40000000)
 			flags |= IORESOURCE_PREFETCH
 				 | PCI_BASE_ADDRESS_MEM_PREFETCH;
@@ -655,6 +657,9 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 				pbm->io_space.start);
 	pci_add_resource_offset(&resources, &pbm->mem_space,
 				pbm->mem_space.start);
+	if (pbm->mem64_space.flags)
+		pci_add_resource_offset(&resources, &pbm->mem64_space,
+					pbm->mem_space.start);
 	pbm->busn.start = pbm->pci_first_busno;
 	pbm->busn.end	= pbm->pci_last_busno;
 	pbm->busn.flags	= IORESOURCE_BUS;
diff --git a/arch/sparc/kernel/pci_common.c b/arch/sparc/kernel/pci_common.c
index 944a06536ecc..33524c1d5328 100644
--- a/arch/sparc/kernel/pci_common.c
+++ b/arch/sparc/kernel/pci_common.c
@@ -406,6 +406,7 @@ void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
 	}
 
 	num_pbm_ranges = i / sizeof(*pbm_ranges);
+	memset(&pbm->mem64_space, 0, sizeof(struct resource));
 
 	for (i = 0; i < num_pbm_ranges; i++) {
 		const struct linux_prom_pci_ranges *pr = &pbm_ranges[i];
@@ -451,7 +452,12 @@ void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
 			break;
 
 		case 3:
-			/* XXX 64-bit MEM handling XXX */
+			/* 64-bit MEM handling */
+			pbm->mem64_space.start = a;
+			pbm->mem64_space.end = a + size - 1UL;
+			pbm->mem64_space.flags = IORESOURCE_MEM;
+			saw_mem = 1;
+			break;
 
 		default:
 			break;
@@ -465,15 +471,22 @@ void pci_determine_mem_io_space(struct pci_pbm_info *pbm)
 		prom_halt();
 	}
 
-	printk("%s: PCI IO[%llx] MEM[%llx]\n",
+	printk("%s: PCI IO[%llx] MEM[%llx]",
 	       pbm->name,
 	       pbm->io_space.start,
 	       pbm->mem_space.start);
+	if (pbm->mem64_space.flags)
+		printk(" MEM64[%llx]",
+		       pbm->mem64_space.start);
+	printk("\n");
 
 	pbm->io_space.name = pbm->mem_space.name = pbm->name;
+	pbm->mem64_space.name = pbm->name;
 
 	request_resource(&ioport_resource, &pbm->io_space);
 	request_resource(&iomem_resource, &pbm->mem_space);
+	if (pbm->mem64_space.flags)
+		request_resource(&iomem_resource, &pbm->mem64_space);
 
 	pci_register_legacy_regions(&pbm->io_space,
 				    &pbm->mem_space);
diff --git a/arch/sparc/kernel/pci_impl.h b/arch/sparc/kernel/pci_impl.h
index 75803c780af3..37222ca849df 100644
--- a/arch/sparc/kernel/pci_impl.h
+++ b/arch/sparc/kernel/pci_impl.h
@@ -97,6 +97,7 @@ struct pci_pbm_info {
 	/* PBM I/O and Memory space resources. */
 	struct resource			io_space;
 	struct resource			mem_space;
+	struct resource			mem64_space;
 	struct resource			busn;
 
 	/* Base of PCI Config space, can be per-PBM or shared. */
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index 09d3afc0a181..b106c67f88c5 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -674,6 +674,14 @@ int pcibios_add_device(struct pci_dev *dev)
 
 int pcibios_alloc_irq(struct pci_dev *dev)
 {
+	/*
+	 * If the PCI device was already claimed by core code and has
+	 * MSI enabled, probing of the pcibios IRQ will overwrite
+	 * dev->irq.  So bail out if MSI is already enabled.
+	 */
+	if (pci_dev_msi_enabled(dev))
+		return -EBUSY;
+
 	return pcibios_enable_irq(dev);
 }