Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...

[sfrench/cifs-2.6.git] / drivers / ata / libata-sff.c

diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index ca7d2245d6840b2580141ceae2b81542366a3d6e..1cce2198baaf1203deb7e1e7e6df305e215501df 100644 (file)
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -1,5 +1,5 @@
 /*
- *  libata-bmdma.c - helper library for PCI IDE BMDMA
+ *  libata-sff.c - helper library for PCI IDE BMDMA
  *
  *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
  *                 Please ALWAYS copy linux-ide@vger.kernel.org
@@ -211,6 +211,8 @@ void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
                tf->hob_lbal = ioread8(ioaddr->lbal_addr);
                tf->hob_lbam = ioread8(ioaddr->lbam_addr);
                tf->hob_lbah = ioread8(ioaddr->lbah_addr);
+               iowrite8(tf->ctl, ioaddr->ctl_addr);
+               ap->last_ctl = tf->ctl;
        }
 }
 
@@ -571,6 +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)