Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  MAINTAINERS: Remove Glenn Streiff from NetEffect entry
  mlx4_core: Improve error message when not enough UAR pages are available
  IB/mlx4: Add support for memory management extensions and local DMA L_Key
  IB/mthca: Keep free count for MTT buddy allocator
  mlx4_core: Keep free count for MTT buddy allocator
  mlx4_code: Add missing FW status return code
  IB/mlx4: Rename struct mlx4_lso_seg to mlx4_wqe_lso_seg
  mlx4_core: Add module parameter to enable QoS support
  RDMA/iwcm: Remove IB_ACCESS_LOCAL_WRITE from remote QP attributes
  IPoIB: Include err code in trace message for ib_sa_path_rec_get() failures
  IB/sa_query: Check if sm_ah is NULL in ib_sa_remove_one()
  IB/ehca: Release mutex in error path of alloc_small_queue_page()
  IB/ehca: Use default value for Local CA ACK Delay if FW returns 0
  IB/ehca: Filter PATH_MIG events if QP was never armed
  IB/iser: Add support for RDMA_CM_EVENT_ADDR_CHANGE event
  RDMA/cma: Add RDMA_CM_EVENT_TIMEWAIT_EXIT event
  RDMA/cma: Add RDMA_CM_EVENT_ADDR_CHANGE event

5 files changed, 11 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h
index 1e9e99a13933..0b0618edd645 100644
--- a/drivers/infiniband/hw/ehca/ehca_classes.h
+++ b/drivers/infiniband/hw/ehca/ehca_classes.h
@@ -194,6 +194,7 @@ struct ehca_qp {
         u32 packet_count;
         atomic_t nr_events; /* events seen */
         wait_queue_head_t wait_completion;
+        int mig_armed;
 };
 
 #define IS_SRQ(qp) (qp->ext_type == EQPT_SRQ)
diff --git a/drivers/infiniband/hw/ehca/ehca_hca.c b/drivers/infiniband/hw/ehca/ehca_hca.c
index bc3b37d2070f..46288220cfbb 100644
--- a/drivers/infiniband/hw/ehca/ehca_hca.c
+++ b/drivers/infiniband/hw/ehca/ehca_hca.c
@@ -114,7 +114,9 @@ int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
         }
 
         props->max_pkeys           = 16;
-        props->local_ca_ack_delay  = min_t(u8, rblock->local_ca_ack_delay, 255);
+        /* Some FW versions say 0 here; insert sensible value in that case */
+        props->local_ca_ack_delay  = rblock->local_ca_ack_delay ?
+                min_t(u8, rblock->local_ca_ack_delay, 255) : 12;
         props->max_raw_ipv6_qp     = limit_uint(rblock->max_raw_ipv6_qp);
         props->max_raw_ethy_qp     = limit_uint(rblock->max_raw_ethy_qp);
         props->max_mcast_grp       = limit_uint(rblock->max_mcast_grp);
diff --git a/drivers/infiniband/hw/ehca/ehca_irq.c b/drivers/infiniband/hw/ehca/ehca_irq.c
index 7a64aa9b51b6..cb55be04442c 100644
--- a/drivers/infiniband/hw/ehca/ehca_irq.c
+++ b/drivers/infiniband/hw/ehca/ehca_irq.c
@@ -178,6 +178,10 @@ static void dispatch_qp_event(struct ehca_shca *shca, struct ehca_qp *qp,
 {
         struct ib_event event;
 
+        /* PATH_MIG without the QP ever having been armed is false alarm */
+        if (event_type == IB_EVENT_PATH_MIG && !qp->mig_armed)
+                return;
+
         event.device = &shca->ib_device;
         event.event = event_type;
 
diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c
index 3f59587338ea..ea13efddf175 100644
--- a/drivers/infiniband/hw/ehca/ehca_qp.c
+++ b/drivers/infiniband/hw/ehca/ehca_qp.c
@@ -1460,6 +1460,8 @@ static int internal_modify_qp(struct ib_qp *ibqp,
                         goto modify_qp_exit2;
                 }
                 mqpcb->path_migration_state = attr->path_mig_state + 1;
+                if (attr->path_mig_state == IB_MIG_REARM)
+                        my_qp->mig_armed = 1;
                 update_mask |=
                         EHCA_BMASK_SET(MQPCB_MASK_PATH_MIGRATION_STATE, 1);
         }
diff --git a/drivers/infiniband/hw/ehca/ipz_pt_fn.c b/drivers/infiniband/hw/ehca/ipz_pt_fn.c
index 661f8db62706..c3a328465431 100644
--- a/drivers/infiniband/hw/ehca/ipz_pt_fn.c
+++ b/drivers/infiniband/hw/ehca/ipz_pt_fn.c
@@ -163,6 +163,7 @@ static int alloc_small_queue_page(struct ipz_queue *queue, struct ehca_pd *pd)
 
 out:
         ehca_err(pd->ib_pd.device, "failed to allocate small queue page");
+        mutex_unlock(&pd->lock);
         return 0;
 }