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Commit c4d8a200 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz Committed by Jeff Garzik
Browse files

pata_via: clear UDMA transfer mode bit for PIO and MWDMA 



Fix register naming while at it.

Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 750c7136

drivers/ata/pata_via.c

+13 −6
Original line number Original line Diff line number Diff line
@@ -303,14 +303,21 @@ static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, int mo 
	}

	}





	/* Set UDMA unless device is not UDMA capable */

	/* Set UDMA unless device is not UDMA capable */

	if (udma_type && t.udma) {

	if (udma_type) {

		u8 cable80_status;

		u8 udma_etc;





		/* Get 80-wire cable detection bit */

		pci_read_config_byte(pdev, 0x50 + offset, &udma_etc);

		pci_read_config_byte(pdev, 0x50 + offset, &cable80_status);

		cable80_status &= 0x10;





		pci_write_config_byte(pdev, 0x50 + offset, ut | cable80_status);

		/* clear transfer mode bit */

		udma_etc &= ~0x20;



		if (t.udma) {

			/* preserve 80-wire cable detection bit */

			udma_etc &= 0x10;

			udma_etc |= ut;

		}



		pci_write_config_byte(pdev, 0x50 + offset, udma_etc);

	}

	}

}

}