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authorBenjamin Herrenschmidt <benh@ozlabs.org>2008-03-28 14:52:29 -0700
committerJeff Garzik <jeff@garzik.org>2008-03-29 12:21:27 -0400
commit0f436eff54f90419ac1b8accfb3e6e17c4b49a4e (patch)
treee360a1e7ee5c2928efa3f1ab590ad9ba1c1927fb
parentaf8be4e4b316df36a00c1e52a9970c253783b57e (diff)
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>
-rw-r--r--drivers/ata/pata_sil680.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index 503245a1eaf..3988e44f493 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -269,7 +269,11 @@ static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio)
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: