pata_sil680: only enable MMIO on Cell blades
There have been reported regressions of the SIL 680 driver when using MMIO, so
this makes it only try MMIO on Cell blades where it's known to be necessary
(the host bridge doesn't do PIO on these).
We'll try to find the root problem with MMIO separately.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index 503245a..3988e44 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -269,7 +269,11 @@
dev_dbg(&pdev->dev, "sil680: BA5_EN = %d clock = %02X\n",
tmpbyte & 1, tmpbyte & 0x30);
- *try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5);
+ *try_mmio = 0;
+#ifdef CONFIG_PPC
+ if (machine_is(cell))
+ *try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5);
+#endif
switch(tmpbyte & 0x30) {
case 0x00: