net/mlx5e: IPoIB, Reset QP after channels are closed

The mlx5e channels should be closed before mlx5i_uninit_underlay_qp
puts the QP into RST (reset) state during mlx5i_close. Currently QP
state incorrectly set to RST before channels got deactivated and closed,
since mlx5_post_send request expects QP in RTS (Ready To Send) state.

The fix is to keep QP in RTS state until mlx5e channels get closed
and to reset QP afterwards.

Also this fix is simply correct in order to keep the open/close flow
symmetric, i.e mlx5i_init_underlay_qp() is called first thing at open,
the correct thing to do is to call mlx5i_uninit_underlay_qp() last thing
at close, which is exactly what this patch is doing.

Fixes: dae37456c8ac ("net/mlx5: Support for attaching multiple underlay QPs to root flow table")
Signed-off-by: Denis Drozdov <denisd@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
index b59953daf8b440e50268c7c1c9a812ba286746d8..11dabd62e2c757e24e0947688d7f25fdd172e88c 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/ipoib/ipoib.c
@@ -560,9 +560,9 @@ static int mlx5i_close(struct net_device *netdev)
 
        netif_carrier_off(epriv->netdev);
        mlx5_fs_remove_rx_underlay_qpn(mdev, ipriv->qp.qpn);
-       mlx5i_uninit_underlay_qp(epriv);
        mlx5e_deactivate_priv_channels(epriv);
        mlx5e_close_channels(&epriv->channels);
+       mlx5i_uninit_underlay_qp(epriv);
 unlock:
        mutex_unlock(&epriv->state_lock);
        return 0;