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pata_it8213: fix wrong PIO timings being programmed 

* do not clear PIO timings for master when programming slave
* program new PIO timings in the correct register nibble

Both changes 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>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-12-03 20:32:10 +01:00 committed by Jeff Garzik
parent e0ee792b75
commit 088ccb53a3
1 changed files with 2 additions and 2 deletions
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4
drivers/ata/pata_it8213.c
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@ -112,13 +112,13 @@ static void it8213_set_piomode (struct ata_port *ap, struct ata_device *adev)
} else {
u8 slave_data;
idetm_data &= 0xCC0F;
idetm_data &= 0xFF0F;
idetm_data |= (control << 4);
/* Slave timing in separate register */
pci_read_config_byte(dev, 0x44, &slave_data);
slave_data &= 0xF0;
slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << 4;
slave_data |= (timings[pio][0] << 2) | timings[pio][1];
pci_write_config_byte(dev, 0x44, slave_data);
}