Commit 69385943 authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz Committed by Jeff Garzik
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ata_piix: fix MWDMA handling on PIIX3 



Fix erroneous check for ap->udma_mask in do_pata_set_dmamode()
resulting in controller not being programmed properly for MWDMA.

Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
parent 95514fd8

drivers/ata/ata_piix.c

+3 −3
Original line number Diff line number Diff line
@@ -869,11 +869,11 @@ static void do_pata_set_dmamode(struct ata_port *ap, struct ata_device *adev, in 
				(timings[pio][1] << 8);

		}



		if (ap->udma_mask) {

		if (ap->udma_mask)

			udma_enable &= ~(1 << devid);



		pci_write_config_word(dev, master_port, master_data);

	}

	}

	/* Don't scribble on 0x48 if the controller does not support UDMA */

	if (ap->udma_mask)

		pci_write_config_byte(dev, 0x48, udma_enable);