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authorTejun Heo <tj@kernel.org>2009-01-29 20:31:31 +0900
committerJeff Garzik <jgarzik@redhat.com>2009-02-02 23:03:08 -0500
commit9913ff8abf1c70a8d52560dc931e1901d025ad27 (patch)
treed91ed8d73e9cb554d071e1d1449d5d0ef883e1a3 /drivers/ata
parent678afac678061ee41bc3007885003c125912a8e2 (diff)
libata: check onlineness before using SPD in sata_down_spd_limit()
sata_down_spd_limit() should check whether the link is online before using the SPD value to determine how to limit the link speed. Factor out onlineness test and test it from sata_down_spd_limit(). Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-core.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index af60d271582..d006e5c4768 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -164,6 +164,11 @@ MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
+static bool ata_sstatus_online(u32 sstatus)
+{
+ return (sstatus & 0xf) == 0x3;
+}
+
/**
* ata_link_next - link iteration helper
* @link: the previous link, NULL to start
@@ -2891,7 +2896,7 @@ int sata_down_spd_limit(struct ata_link *link)
* If not, use cached value in link->sata_spd.
*/
rc = sata_scr_read(link, SCR_STATUS, &sstatus);
- if (rc == 0)
+ if (rc == 0 && ata_sstatus_online(sstatus))
spd = (sstatus >> 4) & 0xf;
else
spd = link->sata_spd;
@@ -5162,7 +5167,7 @@ bool ata_phys_link_online(struct ata_link *link)
u32 sstatus;
if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
- (sstatus & 0xf) == 0x3)
+ ata_sstatus_online(sstatus))
return true;
return false;
}
@@ -5186,7 +5191,7 @@ bool ata_phys_link_offline(struct ata_link *link)
u32 sstatus;
if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
- (sstatus & 0xf) != 0x3)
+ !ata_sstatus_online(sstatus))
return true;
return false;
}