1 files changed, 25 insertions, 19 deletions

diff --git a/drivers/infiniband/hw/mthca/mthca_mad.c b/drivers/infiniband/hw/mthca/mthca_mad.c
index acfa41d968e..b6f7f457fc5 100644
--- a/drivers/infiniband/hw/mthca/mthca_mad.c
+++ b/drivers/infiniband/hw/mthca/mthca_mad.c
@@ -30,8 +30,6 @@
  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
- *
- * $Id: mthca_mad.c 1349 2004-12-16 21:09:43Z roland $
  */
 
 #include <linux/string.h>
@@ -106,7 +104,8 @@ static void update_sm_ah(struct mthca_dev *dev,
  */
 static void smp_snoop(struct ib_device *ibdev,
 		      u8 port_num,
-		      struct ib_mad *mad)
+		      struct ib_mad *mad,
+		      u16 prev_lid)
 {
 	struct ib_event event;
 
@@ -116,6 +115,7 @@ static void smp_snoop(struct ib_device *ibdev,
 		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;
+			u16 lid = be16_to_cpu(pinfo->lid);
 
 			mthca_update_rate(to_mdev(ibdev), port_num);
 			update_sm_ah(to_mdev(ibdev), port_num,
@@ -125,12 +125,15 @@ static void smp_snoop(struct ib_device *ibdev,
 			event.device           = ibdev;
 			event.element.port_num = port_num;
 
-			if(pinfo->clientrereg_resv_subnetto & 0x80)
+			if (pinfo->clientrereg_resv_subnetto & 0x80) {
 				event.event    = IB_EVENT_CLIENT_REREGISTER;
-			else
-				event.event    = IB_EVENT_LID_CHANGE;
+				ib_dispatch_event(&event);
+			}
 
-			ib_dispatch_event(&event);
+			if (prev_lid != lid) {
+				event.event    = IB_EVENT_LID_CHANGE;
+				ib_dispatch_event(&event);
+			}
 		}
 
 		if (mad->mad_hdr.attr_id == IB_SMP_ATTR_PKEY_TABLE) {
@@ -168,6 +171,8 @@ static void forward_trap(struct mthca_dev *dev,
 	if (agent) {
 		send_buf = ib_create_send_mad(agent, qpn, 0, 0, IB_MGMT_MAD_HDR,
 					      IB_MGMT_MAD_DATA, GFP_ATOMIC);
+		if (IS_ERR(send_buf))
+			return;
 		/*
 		 * We rely here on the fact that MLX QPs don't use the
 		 * address handle after the send is posted (this is
@@ -196,8 +201,9 @@ int mthca_process_mad(struct ib_device *ibdev,
 		      struct ib_mad *out_mad)
 {
 	int err;
-	u8 status;
 	u16 slid = in_wc ? in_wc->slid : be16_to_cpu(IB_LID_PERMISSIVE);
+	u16 prev_lid = 0;
+	struct ib_port_attr pattr;
 
 	/* Forward locally generated traps to the SM */
 	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
@@ -235,26 +241,26 @@ int mthca_process_mad(struct ib_device *ibdev,
 			return IB_MAD_RESULT_SUCCESS;
 	} else
 		return IB_MAD_RESULT_SUCCESS;
+	if ((in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_LID_ROUTED ||
+	     in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE) &&
+	    in_mad->mad_hdr.method == IB_MGMT_METHOD_SET &&
+	    in_mad->mad_hdr.attr_id == IB_SMP_ATTR_PORT_INFO &&
+	    !ib_query_port(ibdev, port_num, &pattr))
+		prev_lid = pattr.lid;
 
 	err = mthca_MAD_IFC(to_mdev(ibdev),
 			    mad_flags & IB_MAD_IGNORE_MKEY,
 			    mad_flags & IB_MAD_IGNORE_BKEY,
-			    port_num, in_wc, in_grh, in_mad, out_mad,
-			    &status);
-	if (err) {
-		mthca_err(to_mdev(ibdev), "MAD_IFC failed\n");
-		return IB_MAD_RESULT_FAILURE;
-	}
-	if (status == MTHCA_CMD_STAT_BAD_PKT)
+			    port_num, in_wc, in_grh, in_mad, out_mad);
+	if (err == -EBADMSG)
 		return IB_MAD_RESULT_SUCCESS;
-	if (status) {
-		mthca_err(to_mdev(ibdev), "MAD_IFC returned status %02x\n",
-			  status);
+	else if (err) {
+		mthca_err(to_mdev(ibdev), "MAD_IFC returned %d\n", err);
 		return IB_MAD_RESULT_FAILURE;
 	}
 
 	if (!out_mad->mad_hdr.status) {
-		smp_snoop(ibdev, port_num, in_mad);
+		smp_snoop(ibdev, port_num, in_mad, prev_lid);
 		node_desc_override(ibdev, out_mad);
 	}