Seems nobody else is checking/testing this case as it keeps getting
horked.
If we have no BAR4 mapping on an SFF controller this is *NOT* an error,
it just means it isn't doing BMDMA.
Signed-off-by: Alan Cox <[EMAIL PROTECTED]>
diff -u --new-file --recursive --exclude-from /usr/src/exclude
linux.vanilla-2.6.23rc1-mm1/drivers/ata/libata-sff.c
linux-2.6.23rc1-mm1/drivers/ata/libata-sff.c
--- linux.vanilla-2.6.23rc1-mm1/drivers/ata/libata-sff.c 2007-07-26
15:01:52.899754968 +0100
+++ linux-2.6.23rc1-mm1/drivers/ata/libata-sff.c 2007-07-26
15:17:55.178466368 +0100
@@ -573,6 +573,10 @@
struct pci_dev *pdev = to_pci_dev(gdev);
int i, rc;
+ /* No BAR4 allocation: No DMA */
+ if (pci_resource_start(pdev, 4) == 0)
+ return 0;
+
/* TODO: If we get no DMA mask we should fall back to PIO */
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
-
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