Commit 90dac02c authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
Browse files

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



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: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 1c3fae4d

drivers/scsi/libata-core.c

+12 −4
Original line number Diff line number Diff line
@@ -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;



	while (1) {

		rc = ata_do_reset(ap, hardreset, postreset, 0, classes);

	if (rc || classes[0] != ATA_DEV_UNKNOWN)

		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);