IB/ehca: Use named constant for max mtu

Define and use a constant EHCA_MAX_MTU instead hardcoded value.

Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

2 files changed, 4 insertions, 3 deletions

diff --git a/drivers/infiniband/hw/ehca/ehca_av.c b/drivers/infiniband/hw/ehca/ehca_av.c
index 3bac197f9014..214e2fdddeef 100644
--- a/drivers/infiniband/hw/ehca/ehca_av.c
+++ b/drivers/infiniband/hw/ehca/ehca_av.c
@@ -118,8 +118,7 @@ struct ib_ah *ehca_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
                 }
                 memcpy(&av->av.grh.word_1, &gid, sizeof(gid));
         }
-        /* for the time being we use a hard coded PMTU of 2048 Bytes */
-        av->av.pmtu = 4;
+        av->av.pmtu = EHCA_MAX_MTU;
 
         /* dgid comes in grh.word_3 */
         memcpy(&av->av.grh.word_3, &ah_attr->grh.dgid,
@@ -193,7 +192,7 @@ int ehca_modify_ah(struct ib_ah *ah, struct ib_ah_attr *ah_attr)
                 memcpy(&new_ehca_av.grh.word_1, &gid, sizeof(gid));
         }
 
-        new_ehca_av.pmtu = 4; /* see also comment in create_ah() */
+        new_ehca_av.pmtu = EHCA_MAX_MTU;
 
         memcpy(&new_ehca_av.grh.word_3, &ah_attr->grh.dgid,
                sizeof(ah_attr->grh.dgid));
diff --git a/drivers/infiniband/hw/ehca/hipz_hw.h b/drivers/infiniband/hw/ehca/hipz_hw.h
index 3fc92b031c50..fad91368dc5a 100644
--- a/drivers/infiniband/hw/ehca/hipz_hw.h
+++ b/drivers/infiniband/hw/ehca/hipz_hw.h
@@ -45,6 +45,8 @@
 
 #include "ehca_tools.h"
 
+#define EHCA_MAX_MTU 4
+
 /* QP Table Entry Memory Map */
 struct hipz_qptemm {
         u64 qpx_hcr;