libata: move link onlineness check out of softreset methods

Currently, SATA softresets should do link onlineness check before
actually performing SRST protocol but it doesn't really belong to
softreset.

This patch moves onlineness check in softreset to ata_eh_reset() and
ata_eh_followup_srst_needed() to clean up code and help future sata_mv
changes which need clear separation between SCR and TF accesses.

sata_fsl is peculiar in that its softreset really isn't softreset but
combination of hardreset and softreset.  This patch adds dummy private
->prereset to keep the current behavior but the driver really should
implement separate hard and soft resets and return -EAGAIN from
hardreset if it should be follwed by softreset.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 0 insertions, 6 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 0de6432ee026..739ba3f222e8 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1273,12 +1273,6 @@ static int ahci_softreset(struct ata_link *link, unsigned int *class,
 
         DPRINTK("ENTER\n");
 
-        if (ata_link_offline(link)) {
-                DPRINTK("PHY reports no device\n");
-                *class = ATA_DEV_NONE;
-                return 0;
-        }
-
         /* prepare for SRST (AHCI-1.1 10.4.1) */
         rc = ahci_kick_engine(ap, 1);
         if (rc && rc != -EOPNOTSUPP)