libata: schedule probing after SError access failure during autopsy

If SError isn't accessible, EH can't tell whether hotplug has happened
or not.  Report SError read failure with AC_ERR_OTHER and schedule
probing with hardreset.  This will be mainly useful for PMPs.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index a5a8f84..e7e2ba2 100644 (file)
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1478,8 +1478,12 @@ static void ata_eh_autopsy(struct ata_port *ap)
        if (rc == 0) {
                ehc->i.serror |= serror;
                ata_eh_analyze_serror(ap);
-       } else if (rc != -EOPNOTSUPP)
+       } else if (rc != -EOPNOTSUPP) {
+               /* SError read failed, force hardreset and probing */
+               ata_ehi_schedule_probe(&ehc->i);
                ehc->i.action |= ATA_EH_HARDRESET;
+               ehc->i.err_mask |= AC_ERR_OTHER;
+       }
 
        /* analyze NCQ failure */
        ata_eh_analyze_ncq_error(ap);