IB/mthca: Add client reregister event generation

Change the mthca snoop of MADs that set PortInfo to check if the SM
has set the client reregister bit, and if it has, generate a client
reregister event.  If the bit is not set, just generate a LID change
event as usual.

Signed-off-by: Leonid Arsh <leonida@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 11 insertions, 3 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_mad.c b/drivers/infiniband/hw/mthca/mthca_mad.c
index 4730863ece9a..d9bc030bcccc 100644
--- a/drivers/infiniband/hw/mthca/mthca_mad.c
+++ b/drivers/infiniband/hw/mthca/mthca_mad.c
@@ -114,14 +114,22 @@ static void smp_snoop(struct ib_device *ibdev,
              mad->mad_hdr.mgmt_class  == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
             mad->mad_hdr.method     == IB_MGMT_METHOD_SET) {
                 if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO) {
+                        struct ib_port_info *pinfo =
+                                (struct ib_port_info *) ((struct ib_smp *) mad)->data;
+
                         mthca_update_rate(to_mdev(ibdev), port_num);
                         update_sm_ah(to_mdev(ibdev), port_num,
-                                     be16_to_cpup((__be16 *) (mad->data + 58)),
-                                     (*(u8 *) (mad->data + 76)) & 0xf);
+                                     be16_to_cpu(pinfo->lid),
+                                     pinfo->neighbormtu_mastersmsl & 0xf);
 
                         event.device           = ibdev;
-                        event.event            = IB_EVENT_LID_CHANGE;
                         event.element.port_num = port_num;
+
+                        if(pinfo->clientrereg_resv_subnetto & 0x80)
+                                event.event    = IB_EVENT_CLIENT_REREGISTER;
+                        else
+                                event.event    = IB_EVENT_LID_CHANGE;
+
                         ib_dispatch_event(&event);
                 }