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pata_sil680: only enable MMIO on Cell blades

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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>
This commit is contained in:
Benjamin Herrenschmidt 2008-03-28 14:52:29 -07:00 committed by Jeff Garzik
parent af8be4e4b3
commit 0f436eff54
1 changed files with 5 additions and 1 deletions
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6
drivers/ata/pata_sil680.c
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@ -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: