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libata: fix hw_sata_spd_limit initialization

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hw_sata_spd_limit used to be incorrectly initialized to zero instead
of UINT_MAX if SPD is zero in SControl register.  This breaks PHY
speed down.  Fix it.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-06-06 16:35:55 +09:00 committed by Jeff Garzik
parent ef143d577b
commit afe3cc51ba
1 changed files with 2 additions and 1 deletions
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drivers/ata/libata-core.c
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@ -6317,6 +6317,7 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
/* init sata_spd_limit to the current value */
if (sata_scr_read(ap, SCR_CONTROL, &scontrol) == 0) {
int spd = (scontrol >> 4) & 0xf;
if (spd)
ap->hw_sata_spd_limit &= (1 << spd) - 1;
}
ap->sata_spd_limit = ap->hw_sata_spd_limit;