IB/hfi1: Update SMA ingress checks for response packets

Fix "unsupported method" error by skipping ingress pkey checks on
response SMA packets.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/hfi1/ud.c b/drivers/infiniband/hw/hfi1/ud.c
index 090e716..97ae24b 100644 (file)
--- a/drivers/infiniband/hw/hfi1/ud.c
+++ b/drivers/infiniband/hw/hfi1/ud.c
@@ -559,8 +559,8 @@ void return_cnp(struct hfi1_ibport *ibp, struct rvt_qp *qp, u32 remote_qpn,
 
 /*
  * opa_smp_check() - Do the regular pkey checking, and the additional
- * checks for SMPs specified in OPAv1 rev 0.90, section 9.10.26
- * ("SMA Packet Checks").
+ * checks for SMPs specified in OPAv1 rev 1.0, 9/19/2016 update, section
+ * 9.10.25 ("SMA Packet Checks").
  *
  * Note that:
  *   - Checks are done using the pkey directly from the packet's BTH,
@@ -603,23 +603,28 @@ static int opa_smp_check(struct hfi1_ibport *ibp, u16 pkey, u8 sc5,
 
        /*
         * SMPs fall into one of four (disjoint) categories:
-        * SMA request, SMA response, trap, or trap repress.
-        * Our response depends, in part, on which type of
-        * SMP we're processing.
+        * SMA request, SMA response, SMA trap, or SMA trap repress.
+        * Our response depends, in part, on which type of SMP we're
+        * processing.
         *
-        * If this is not an SMA request, or trap repress:
-        *   - accept MAD if the port is running an SM
-        *   - pkey == FULL_MGMT_P_KEY =>
-        *       reply with unsupported method (i.e., just mark
-        *       the smp's status field here, and let it be
-        *       processed normally)
-        *   - pkey != LIM_MGMT_P_KEY =>
-        *       increment port recv constraint errors, drop MAD
-        * If this is an SMA request or trap repress:
+        * If this is an SMA response, skip the check here.
+        *
+        * If this is an SMA request or SMA trap repress:
         *   - pkey != FULL_MGMT_P_KEY =>
         *       increment port recv constraint errors, drop MAD
+        *
+        * Otherwise:
+        *    - accept if the port is running an SM
+        *    - drop MAD if it's an SMA trap
+        *    - pkey == FULL_MGMT_P_KEY =>
+        *        reply with unsupported method
+        *    - pkey != FULL_MGMT_P_KEY =>
+        *        increment port recv constraint errors, drop MAD
         */
        switch (smp->method) {
+       case IB_MGMT_METHOD_GET_RESP:
+       case IB_MGMT_METHOD_REPORT_RESP:
+               break;
        case IB_MGMT_METHOD_GET:
        case IB_MGMT_METHOD_SET:
        case IB_MGMT_METHOD_REPORT:
@@ -629,23 +634,17 @@ static int opa_smp_check(struct hfi1_ibport *ibp, u16 pkey, u8 sc5,
                        return 1;
                }
                break;
-       case IB_MGMT_METHOD_SEND:
-       case IB_MGMT_METHOD_TRAP:
-       case IB_MGMT_METHOD_GET_RESP:
-       case IB_MGMT_METHOD_REPORT_RESP:
+       default:
                if (ibp->rvp.port_cap_flags & IB_PORT_SM)
                        return 0;
+               if (smp->method == IB_MGMT_METHOD_TRAP)
+                       return 1;
                if (pkey == FULL_MGMT_P_KEY) {
                        smp->status |= IB_SMP_UNSUP_METHOD;
                        return 0;
                }
-               if (pkey != LIM_MGMT_P_KEY) {
-                       ingress_pkey_table_fail(ppd, pkey, slid);
-                       return 1;
-               }
-               break;
-       default:
-               break;
+               ingress_pkey_table_fail(ppd, pkey, slid);
+               return 1;
        }
        return 0;
 }