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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-10-09 13:27:28 +1000
committerPaul Mackerras <paulus@samba.org>2006-10-10 11:54:26 +1000
commit1e1b20a119ac45a290bbc6261f69a2a6a2cc064a (patch)
tree22cdf1c819a7b7fb2e475166b83682d9853a054d
parentc10af8c38da7a0bc9010d6609237c1ab6d2da12c (diff)
[POWERPC] Fix Maple secondary IDE interrupt
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>
-rw-r--r--arch/powerpc/platforms/maple/pci.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/maple/pci.c b/arch/powerpc/platforms/maple/pci.c
index 8debae3aa3c9..63b4d1bff359 100644
--- a/arch/powerpc/platforms/maple/pci.c
+++ b/arch/powerpc/platforms/maple/pci.c
@@ -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");