IB/core: Reuse gid_table_release_one() in table allocation failure

_gid_table_setup_one() only performs GID table cache memory allocation,
marks entries as invalid (free) and marks the reserved entries.
At this point GID table is empty and no entries are added.

On dual port device if _gid_table_setup_one() fails to allocate the gid
table for 2nd port, there is no need to perform cleanup_gid_table_port()
to delete GID entries, as GID table is empty.
Therefore make use of existing gid_table_release_one() routine which
frees the GID table memory and avoid code duplication.
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/cache.c

@@ -778,50 +778,40 @@ static void gid_table_reserve_default(struct ib_device *ib_dev, u8 port,
 	}
 }
 
+
+static void gid_table_release_one(struct ib_device *ib_dev)
+{
+	struct ib_gid_table *table;
+	u8 port;
+
+	for (port = 0; port < ib_dev->phys_port_cnt; port++) {
+		table = ib_dev->cache.ports[port].gid;
+		release_gid_table(table);
+		ib_dev->cache.ports[port].gid = NULL;
+	}
+}
+
 static int _gid_table_setup_one(struct ib_device *ib_dev)
 {
 	u8 port;
 	struct ib_gid_table *table;
-	int err = 0;
 
 	for (port = 0; port < ib_dev->phys_port_cnt; port++) {
 		u8 rdma_port = port + rdma_start_port(ib_dev);
 
 		table =	alloc_gid_table(
 				ib_dev->port_immutable[rdma_port].gid_tbl_len);
-		if (!table) {
-			err = -ENOMEM;
+		if (!table)
 			goto rollback_table_setup;
-		}
 
 		gid_table_reserve_default(ib_dev, rdma_port, table);
 		ib_dev->cache.ports[port].gid = table;
 	}
-
 	return 0;
 
 rollback_table_setup:
-	for (port = 0; port < ib_dev->phys_port_cnt; port++) {
-		table = ib_dev->cache.ports[port].gid;
-
-		cleanup_gid_table_port(ib_dev, port + rdma_start_port(ib_dev),
-				       table);
-		release_gid_table(table);
-	}
-
-	return err;
-}
-
-static void gid_table_release_one(struct ib_device *ib_dev)
-{
-	struct ib_gid_table *table;
-	u8 port;
-
-	for (port = 0; port < ib_dev->phys_port_cnt; port++) {
-		table = ib_dev->cache.ports[port].gid;
-		release_gid_table(table);
-		ib_dev->cache.ports[port].gid = NULL;
-	}
+	gid_table_release_one(ib_dev);
+	return -ENOMEM;
 }
 
 static void gid_table_cleanup_one(struct ib_device *ib_dev)