linux-kernel - [PATCH][resend] fix IDE legacy mode resources

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Date:	Fri, 24 Aug 2007 11:55:59 +0900
From:	Yoichi Yuasa <yoichi_yuasa@...peaks.co.jp>
To:	Greg KH <greg@...ah.com>
Cc:	yoichi_yuasa@...peaks.co.jp, Jeff Garzik <jeff@...zik.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org, Martin Michlmayr <tbm@...ius.com>
Subject: [PATCH][resend] fix IDE legacy mode resources

Hi,

I got the following error on MIPS Cobalt.

PCI: Unable to reserve I/O region #1:8@...001f0 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@...00170 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@...001f0 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[]. 

Yoichi

---

Fix legacy mode IDE resources 

Signed-off-by: Yoichi Yuasa <yoichi_yuasa@...peaks.co.jp>

diff -pruN -X generic/Documentation/dontdiff generic-orig/drivers/pci/probe.c generic/drivers/pci/probe.c
--- generic-orig/drivers/pci/probe.c	2007-07-26 17:07:44.151670750 +0900
+++ generic/drivers/pci/probe.c	2007-07-26 17:25:42.227046250 +0900
@@ -744,22 +744,40 @@ static int pci_setup_device(struct pci_d
 		 */
 		if (class == PCI_CLASS_STORAGE_IDE) {
 			u8 progif;
+			struct pci_bus_region region;
+			struct resource resource;
 			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;
+				resource.start = 0x1F0;
+				resource.end = 0x1F7;
+				resource.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;
+				resource.start = 0x170;
+				resource.end = 0x177;
+				resource.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;
-
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