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authorTejun Heo <htejun@gmail.com>2007-06-06 16:35:55 +0900
committerJeff Garzik <jeff@garzik.org>2007-06-09 22:40:28 -0400
commitafe3cc51ba4be6b25b721c40f178ea4157751161 (patch)
tree8281e8feaaf3fd7f318d2b3d3fde62340ecbdbca /drivers/ata
parentef143d577ba98c8a53aee9aa60e7d1f07c32fd7a (diff)
libata: fix hw_sata_spd_limit initialization
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>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-core.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index e7937166a8b..bf8d3b8c171 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6317,7 +6317,8 @@ 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;
- ap->hw_sata_spd_limit &= (1 << spd) - 1;
+ if (spd)
+ ap->hw_sata_spd_limit &= (1 << spd) - 1;
}
ap->sata_spd_limit = ap->hw_sata_spd_limit;