diff --git a/drivers/infiniband/hw/qib/qib.h b/drivers/infiniband/hw/qib/qib.h
index 3593983..e67dba4 100644
--- a/drivers/infiniband/hw/qib/qib.h
+++ b/drivers/infiniband/hw/qib/qib.h
@@ -326,6 +326,9 @@
 
 #define QIB_DEFAULT_MTU 4096
 
+/* max number of IB ports supported per HCA */
+#define QIB_MAX_IB_PORTS 2
+
 /*
  * Possible IB config parameters for f_get/set_ib_table()
  */
diff --git a/drivers/infiniband/hw/qib/qib_tx.c b/drivers/infiniband/hw/qib/qib_tx.c
index af30232..7f36454 100644
--- a/drivers/infiniband/hw/qib/qib_tx.c
+++ b/drivers/infiniband/hw/qib/qib_tx.c
@@ -170,7 +170,7 @@
 void qib_disarm_piobufs_set(struct qib_devdata *dd, unsigned long *mask,
 			    unsigned cnt)
 {
-	struct qib_pportdata *ppd, *pppd[dd->num_pports];
+	struct qib_pportdata *ppd, *pppd[QIB_MAX_IB_PORTS];
 	unsigned i;
 	unsigned long flags;