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    Subject[PATCH 39/86] pata_it8213: fix wrong MWDMA timings being programmed
    From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
    Subject: [PATCH] pata_it8213: fix wrong MWDMA timings being programmed

    Clear old MWDMA timings before programming new ones (IT8213
    is a single port host so there is no need to check ap->port_no).

    This change should be safe as this is how we have been doing
    things in IDE it8213 host driver for years.

    Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
    ---
    drivers/ata/pata_it8213.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    Index: b/drivers/ata/pata_it8213.c
    ===================================================================
    --- a/drivers/ata/pata_it8213.c
    +++ b/drivers/ata/pata_it8213.c
    @@ -211,7 +211,7 @@ static void it8213_set_dmamode (struct a
    master_data &= 0xFF4F; /* Mask out IORDY|TIME1|DMAONLY */
    master_data |= control << 4;
    pci_read_config_byte(dev, 0x44, &slave_data);
    - slave_data &= (0x0F + 0xE1 * ap->port_no);
    + slave_data &= 0xF0;
    /* Load the matching timing */
    slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);
    pci_write_config_byte(dev, 0x44, slave_data);

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