commit fd6e732186ab522c812ab19c2c5e5befb8ec8115
author Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Tue Oct 02 14:19:23 2007 -0700
committer Greg Kroah-Hartman <gregkh@suse.de> Fri Oct 12 15:03:17 2007 -0700
tree dd65db780133a32476c5d68f21aa8350221d62e4
parent cbf5d9e6b9bcf03291cbb51db144b3e2773a8a2d

PCI: fix IDE legacy mode resources

I got the following error on MIPS Cobalt.

PCI: Unable to reserve I/O region #1:8@f00001f0 for device 0000:00:09.1
pata_via 0000:00:09.1: failed to request/iomap BARs for port 0 (errno=-16)
PCI: Unable to reserve I/O region #3:8@f0000170 for device 0000:00:09.1
pata_via 0000:00:09.1: failed to request/iomap BARs for port 1 (errno=-16)
pata_via 0000:00:09.1: no available native port

The legacy mode IDE resources set the following order.

pci_setup_device()
    Legacy mode ATA controllers have fixed addresses.
    IDE resources: 0x1F0-0x1F7, 0x3F6, 0x170-0x177, 0x376
    |
    V
pcibios_fixup_bus()
    MIPS Cobalt PCI bus regions have the -0x10000000 offset from PCI resources.
    pcibios_fixup_bus() fix PCI bus regions.
    0x1F0 - 0x10000000 = 0xF00001F0
    |
    V
ata_pci_init_one()
    PCI: Unable to reserve I/O region #1:8@f00001f0 for device 0000:00:09.1

In some architectures, PCI bus regions have the offset from PCI resources. 
For this reason, pci_setup_device() should set PCI bus regions to
dev->resource[].

[akpm@linux-foundation.org: use struct initialiser]
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Greg KH <greg@kroah.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/pci/probe.c

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 171ca71..40e571d 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -744,22 +744,46 @@
 		 */
 		if (class == PCI_CLASS_STORAGE_IDE) {
 			u8 progif;
+			struct pci_bus_region region;
+
 			pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
 			if ((progif & 1) == 0) {
-				dev->resource[0].start = 0x1F0;
-				dev->resource[0].end = 0x1F7;
-				dev->resource[0].flags = LEGACY_IO_RESOURCE;
-				dev->resource[1].start = 0x3F6;
-				dev->resource[1].end = 0x3F6;
-				dev->resource[1].flags = LEGACY_IO_RESOURCE;
+				struct resource resource = {
+					.start = 0x1F0,
+					.end = 0x1F7,
+					.flags = LEGACY_IO_RESOURCE,
+				};
+
+				pcibios_resource_to_bus(dev, &region, &resource);
+				dev->resource[0].start = region.start;
+				dev->resource[0].end = region.end;
+				dev->resource[0].flags = resource.flags;
+				resource.start = 0x3F6;
+				resource.end = 0x3F6;
+				resource.flags = LEGACY_IO_RESOURCE;
+				pcibios_resource_to_bus(dev, &region, &resource);
+				dev->resource[1].start = region.start;
+				dev->resource[1].end = region.end;
+				dev->resource[1].flags = resource.flags;
 			}
 			if ((progif & 4) == 0) {
-				dev->resource[2].start = 0x170;
-				dev->resource[2].end = 0x177;
-				dev->resource[2].flags = LEGACY_IO_RESOURCE;
-				dev->resource[3].start = 0x376;
-				dev->resource[3].end = 0x376;
-				dev->resource[3].flags = LEGACY_IO_RESOURCE;
+				struct resource resource = {
+					.start = 0x170,
+					.end = 0x177,
+					.flags = LEGACY_IO_RESOURCE,
+				};
+
+				pcibios_resource_to_bus(dev, &region, &resource);
+				dev->resource[2].start = region.start;
+				dev->resource[2].end = region.end;
+				dev->resource[2].flags = resource.flags;
+				resource.start = 0x376;
+				resource.end = 0x376;
+				resource.flags = LEGACY_IO_RESOURCE;
+				pcibios_resource_to_bus(dev, &region, &resource);
+				dev->resource[3].start = region.start;
+				dev->resource[3].end = region.end;
+				dev->resource[3].flags = resource.flags;
 			}
 		}
 		break;