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[PATCH] libata: use SATA speed down in ata_drive_probe_reset()

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Make ata_drive_probe_reset() use SATA SPD configuration.  Hardreset
will be force if speed renegotiation is necessary.  Also, if a
hardreset fails, PHY speed is stepped down and hardreset is retried
until the lowest speed is reached.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2006-04-02 17:54:46 +09:00 committed by Jeff Garzik
parent 1c3fae4d7e
commit 90dac02c08
1 changed files with 12 additions and 4 deletions
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16
drivers/scsi/libata-core.c
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@ -2578,7 +2578,7 @@ int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
if (probeinit)
probeinit(ap);
if (softreset) {
if (softreset && !ata_set_sata_spd_needed(ap)) {
rc = ata_do_reset(ap, softreset, postreset, 0, classes);
if (rc == 0 && classes[0] != ATA_DEV_UNKNOWN)
goto done;
@ -2587,9 +2587,17 @@ int ata_drive_probe_reset(struct ata_port *ap, ata_probeinit_fn_t probeinit,
if (!hardreset)
goto done;
rc = ata_do_reset(ap, hardreset, postreset, 0, classes);
if (rc || classes[0] != ATA_DEV_UNKNOWN)
goto done;
while (1) {
rc = ata_do_reset(ap, hardreset, postreset, 0, classes);
if (rc == 0) {
if (classes[0] != ATA_DEV_UNKNOWN)
goto done;
break;
}
if (ata_down_sata_spd_limit(ap))
goto done;
}
if (softreset)
rc = ata_do_reset(ap, softreset, postreset, 0, classes);