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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2007-07-26 18:41:30 +0100
committerJeff Garzik <jeff@garzik.org>2007-08-01 10:00:56 -0400
commit6fdc99a224bd52020c602c3d4d57e5f8a75f6bb8 (patch)
tree34eccedf0dd9d24e6c9b73d7d24bacaac7595446
parentdbf0c89c80e47a2a132048dcded0dcc2a59c74ad (diff)
libata-sff; Unbreak non DMA capable controllers again
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 <alan@redhat.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
-rw-r--r--drivers/ata/libata-sff.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index 6c289c7b132..1cce2198baa 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -573,6 +573,10 @@ int ata_pci_init_bmdma(struct ata_host *host)
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)