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Subject[PATCH v2 1/4] ata_piix: SITRE handling fix
Date
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH v2] ata_piix: SITRE handling fix

Set SITRE (separate slave timing register) bit also in master-only
configurations to match other PIIX-alike drivers and make further
changes easier.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
v2: updated patch description

earlier references:
https://lkml.org/lkml/2011/2/8/98

drivers/ata/ata_piix.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

Index: b/drivers/ata/ata_piix.c
===================================================================
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -750,8 +750,6 @@ static void piix_set_timings(struct ata_
if (is_slave) {
/* clear TIME1|IE1|PPE1|DTE1 */
master_data &= 0xff0f;
- /* Enable SITRE (separate slave timing register) */
- master_data |= 0x4000;
/* enable PPE1, IE1 and TIME1 as needed */
master_data |= (control << 4);
pci_read_config_byte(dev, slave_port, &slave_data);
@@ -769,6 +767,9 @@ static void piix_set_timings(struct ata_
(timings[pio][0] << 12) |
(timings[pio][1] << 8);
}
+
+ /* Enable SITRE (separate slave timing register) */
+ master_data |= 0x4000;
pci_write_config_word(dev, master_port, master_data);
if (is_slave)
pci_write_config_byte(dev, slave_port, slave_data);

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