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Revert "adjust legacy IDE resource setting (v2)"

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This reverts commit ed8ccee091.

It causes hang on boot for some users and we don't yet know why:

http://bugzilla.kernel.org/show_bug.cgi?id=7562

http://lkml.org/lkml/2007/4/20/404
http://lkml.org/lkml/2007/3/25/113

Just reverse it for 2.6.21-final, having broken X server is somehow
better than unbootable system.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-04-23 23:19:36 +02:00
parent c445a31cd7
commit 01abc2aa0f
1 changed files with 13 additions and 32 deletions
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45
drivers/pci/probe.c
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@ -682,34 +682,7 @@ static void pci_read_irq(struct pci_dev *dev)
dev->irq = irq;
}
static void change_legacy_io_resource(struct pci_dev * dev, unsigned index,
unsigned start, unsigned end)
{
unsigned base = start & PCI_BASE_ADDRESS_IO_MASK;
unsigned len = (end | ~PCI_BASE_ADDRESS_IO_MASK) - base + 1;
/*
* Some X versions get confused when the BARs reported through
* /sys or /proc differ from those seen in config space, thus
* try to update the config space values, too.
*/
if (!(pci_resource_flags(dev, index) & IORESOURCE_IO))
printk(KERN_WARNING "%s: cannot adjust BAR%u (not I/O)\n",
pci_name(dev), index);
else if (pci_resource_len(dev, index) != len)
printk(KERN_WARNING "%s: cannot adjust BAR%u (size %04X)\n",
pci_name(dev), index, (unsigned)pci_resource_len(dev, index));
else {
printk(KERN_INFO "%s: trying to change BAR%u from %04X to %04X\n",
pci_name(dev), index,
(unsigned)pci_resource_start(dev, index), base);
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0 + index * 4, base);
}
pci_resource_start(dev, index) = start;
pci_resource_end(dev, index) = end;
pci_resource_flags(dev, index) =
IORESOURCE_IO | IORESOURCE_PCI_FIXED | PCI_BASE_ADDRESS_SPACE_IO;
}
#define LEGACY_IO_RESOURCE (IORESOURCE_IO | IORESOURCE_PCI_FIXED)
/**
* pci_setup_device - fill in class and map information of a device
@ -762,12 +735,20 @@ static int pci_setup_device(struct pci_dev * dev)
u8 progif;
pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
if ((progif & 1) == 0) {
change_legacy_io_resource(dev, 0, 0x1F0, 0x1F7);
change_legacy_io_resource(dev, 1, 0x3F6, 0x3F6);
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;
}
if ((progif & 4) == 0) {
change_legacy_io_resource(dev, 2, 0x170, 0x177);
change_legacy_io_resource(dev, 3, 0x376, 0x376);
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;
}
}
break;