This is a note to let you know that I've just added the patch titled net/mlx5: E-Switch, Re-enable RoCE on mode change only after FDB destroy to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-mlx5-e-switch-re-enable-roce-on-mode-change-only-after-fdb-destroy.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Wed Aug 9 10:32:06 PDT 2017 From: Or Gerlitz <ogerlitz@xxxxxxxxxxxx> Date: Sun, 15 Jan 2017 19:05:38 +0200 Subject: net/mlx5: E-Switch, Re-enable RoCE on mode change only after FDB destroy From: Or Gerlitz <ogerlitz@xxxxxxxxxxxx> [ Upstream commit 5bae8c031053c69b4aa74b7f1ba15d4ec8426208 ] We must re-enable RoCE on the e-switch management port (PF) only after destroying the FDB in its switchdev/offloaded mode. Otherwise, when encapsulation is supported, this re-enablement will fail. Also, it's more natural and symmetric to disable RoCE on the PF before we create the FDB under switchdev mode, so do that as well and revert if getting into error during the mode change later. Fixes: 9da34cd34e85 ('net/mlx5: Disable RoCE on the e-switch management [..]') Signed-off-by: Or Gerlitz <ogerlitz@xxxxxxxxxxxx> Reviewed-by: Hadar Hen Zion <hadarh@xxxxxxxxxxxx> Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 29 ++++++++----- 1 file changed, 18 insertions(+), 11 deletions(-) --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c @@ -651,9 +651,14 @@ int esw_offloads_init(struct mlx5_eswitc int vport; int err; + /* disable PF RoCE so missed packets don't go through RoCE steering */ + mlx5_dev_list_lock(); + mlx5_remove_dev_by_protocol(esw->dev, MLX5_INTERFACE_PROTOCOL_IB); + mlx5_dev_list_unlock(); + err = esw_create_offloads_fdb_table(esw, nvports); if (err) - return err; + goto create_fdb_err; err = esw_create_offloads_table(esw); if (err) @@ -673,11 +678,6 @@ int esw_offloads_init(struct mlx5_eswitc goto err_reps; } - /* disable PF RoCE so missed packets don't go through RoCE steering */ - mlx5_dev_list_lock(); - mlx5_remove_dev_by_protocol(esw->dev, MLX5_INTERFACE_PROTOCOL_IB); - mlx5_dev_list_unlock(); - return 0; err_reps: @@ -694,6 +694,13 @@ create_fg_err: create_ft_err: esw_destroy_offloads_fdb_table(esw); + +create_fdb_err: + /* enable back PF RoCE */ + mlx5_dev_list_lock(); + mlx5_add_dev_by_protocol(esw->dev, MLX5_INTERFACE_PROTOCOL_IB); + mlx5_dev_list_unlock(); + return err; } @@ -701,11 +708,6 @@ static int esw_offloads_stop(struct mlx5 { int err, err1, num_vfs = esw->dev->priv.sriov.num_vfs; - /* enable back PF RoCE */ - mlx5_dev_list_lock(); - mlx5_add_dev_by_protocol(esw->dev, MLX5_INTERFACE_PROTOCOL_IB); - mlx5_dev_list_unlock(); - mlx5_eswitch_disable_sriov(esw); err = mlx5_eswitch_enable_sriov(esw, num_vfs, SRIOV_LEGACY); if (err) { @@ -715,6 +717,11 @@ static int esw_offloads_stop(struct mlx5 esw_warn(esw->dev, "Failed setting eswitch back to offloads, err %d\n", err); } + /* enable back PF RoCE */ + mlx5_dev_list_lock(); + mlx5_add_dev_by_protocol(esw->dev, MLX5_INTERFACE_PROTOCOL_IB); + mlx5_dev_list_unlock(); + return err; } Patches currently in stable-queue which might be from ogerlitz@xxxxxxxxxxxx are queue-4.9/net-mlx5-e-switch-re-enable-roce-on-mode-change-only-after-fdb-destroy.patch