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[POWERPC] Fix Maple secondary IDE interrupt

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The IDE driver will pick up the PCI IRQ for both channels on Maple
despite the fact that it's in legacy mode. This works around it by
"hiding" the PCI IRQ of the AMD8111 IDE controller when it's configured
in legacy mode on the Maple platform, thus causing the driver to call
pci_get_legacy_ide_irq() which will return the correct interrupts for
both channels.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2006-10-09 13:27:28 +10:00 committed by Paul Mackerras
parent c10af8c38d
commit 1e1b20a119
1 changed files with 15 additions and 2 deletions
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17
arch/powerpc/platforms/maple/pci.c
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@ -516,8 +516,21 @@ void __init maple_pcibios_fixup(void)
dev->irq = irq_create_mapping(NULL, 1);
if (dev->irq != NO_IRQ)
set_irq_type(dev->irq, IRQ_TYPE_LEVEL_LOW);
} else
pci_read_irq_line(dev);
continue;
}
/* Hide AMD8111 IDE interrupt when in legacy mode so
* the driver calls pci_get_legacy_ide_irq()
*/
if (dev->vendor == PCI_VENDOR_ID_AMD &&
dev->device == PCI_DEVICE_ID_AMD_8111_IDE &&
(dev->class & 5) != 5) {
dev->irq = NO_IRQ;
continue;
}
/* For all others, map the interrupt from the device-tree */
pci_read_irq_line(dev);
}
DBG(" <- maple_pcibios_fixup\n");