[SCSI] mptfusion: Support SAS2.0 Devices with SAS1.0 Controllers

SAS1.0 Controller was not able to detect SAS2.0 Expanders due to Link
RATE detection was limited to 1.5 Gbps and 3.0 Gbps for SAS1
controllers. Added detection for 6.0 Gbps link.  Now, user can mix-up
6.0 Gpbs links with SAS1.0 controller.

e.g SAS1.0 HBA <----> SAS2.0 Expander <------> SAS2.0 Expander <--------> SAS1.0 Drive.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 8aefb1829fcd..518cfcaaaa4e 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -3063,6 +3063,9 @@ static int mptsas_probe_one_phy(struct device *dev,
         case MPI_SAS_IOUNIT0_RATE_3_0:
                 phy->negotiated_linkrate = SAS_LINK_RATE_3_0_GBPS;
                 break;
+        case MPI_SAS_IOUNIT0_RATE_6_0:
+                phy->negotiated_linkrate = SAS_LINK_RATE_6_0_GBPS;
+                break;
         case MPI_SAS_IOUNIT0_RATE_SATA_OOB_COMPLETE:
         case MPI_SAS_IOUNIT0_RATE_UNKNOWN:
         default:
@@ -3691,7 +3694,8 @@ mptsas_send_link_status_event(struct fw_event_work *fw_event)
         }
 
         if (link_rate == MPI_SAS_IOUNIT0_RATE_1_5 ||
-            link_rate == MPI_SAS_IOUNIT0_RATE_3_0) {
+            link_rate == MPI_SAS_IOUNIT0_RATE_3_0 ||
+            link_rate == MPI_SAS_IOUNIT0_RATE_6_0) {
 
                 if (!port_info) {
                         if (ioc->old_sas_discovery_protocal) {