The patch titled
pata_sil680: only enable MMIO on Cell blades
has been added to the -mm tree. Its filename is
pata_sil680-only-enable-mmio-on-cell-blades.patch
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Subject: pata_sil680: only enable MMIO on Cell blades
From: Benjamin Herrenschmidt <benh@xxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxxx>
Acked-by: Alan Cox <alan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/ata/pata_sil680.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff -puN drivers/ata/pata_sil680.c~pata_sil680-only-enable-mmio-on-cell-blades drivers/ata/pata_sil680.c
--- a/drivers/ata/pata_sil680.c~pata_sil680-only-enable-mmio-on-cell-blades
+++ a/drivers/ata/pata_sil680.c
@@ -229,7 +229,11 @@ static u8 sil680_init_chip(struct pci_de
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:
_
Patches currently in -mm which might be from benh@xxxxxxxxxx are
pata_sil680-only-enable-mmio-on-cell-blades.patch
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