[PATCH for-next v3 2/2] RDMA/rxe: Call rxe_set_mtu after rxe_register_device

[Li Zhijian]

rxe_set_mtu() will call rxe_info_dev() to print message, and
rxe_info_dev() expects dev_name(rxe->ib_dev->dev) has been assigned.

Previously since dev_name() is not set, when a new rxe link is being
added, 'null' will be used as the dev_name like:

"(null): rxe_set_mtu: Set mtu to 1024"

Move rxe_register_device() earlier to assign the correct dev_name
so that it can be read by rxe_set_mtu() later.

And it's safe to do such change since mtu will not be used during the
rxe_register_device()

After this change, the message becomes:
"rxe_eth0: rxe_set_mtu: Set mtu to 4096"

Fixes: 9ac01f434a1e ("RDMA/rxe: Extend dbg log messages to err and info")
Reviewed-by: Daisuke Matsuda <matsuda-daisuke@xxxxxxxxxxx>
Reviewed-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
 drivers/infiniband/sw/rxe/rxe.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe.c b/drivers/infiniband/sw/rxe/rxe.c
index a086d588e159..8a43c0c4f8d8 100644
--- a/drivers/infiniband/sw/rxe/rxe.c
+++ b/drivers/infiniband/sw/rxe/rxe.c
@@ -169,10 +169,13 @@ void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
  */
 int rxe_add(struct rxe_dev *rxe, unsigned int mtu, const char *ibdev_name)
 {
+	int ret;
+
 	rxe_init(rxe);
+	ret = rxe_register_device(rxe, ibdev_name);
 	rxe_set_mtu(rxe, mtu);
 
-	return rxe_register_device(rxe, ibdev_name);
+	return ret;
 }
 
 static int rxe_newlink(const char *ibdev_name, struct net_device *ndev)
-- 
2.29.2