This is a note to let you know that I've just added the patch titled
net/mlx5: E-switch, Devcom, sync devcom events and devcom comp register
to the 6.1-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-devcom-sync-devcom-events-and-devc.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a2faf150514ee4a652fafe17c2dcb05efa261f8d
Author: Shay Drory <shayd@xxxxxxxxxx>
Date: Mon Feb 6 11:52:02 2023 +0200
net/mlx5: E-switch, Devcom, sync devcom events and devcom comp register
[ Upstream commit 8c253dfc89efde6b5faddf9e7400e5d17884e042 ]
devcom events are sent to all registered component. Following the
cited patch, it is possible for two components, e.g.: two eswitches,
to send devcom events, while both components are registered. This
means eswitch layer will do double un/pairing, which is double
allocation and free of resources, even though only one un/pairing is
needed. flow example:
cpu0 cpu1
---- ----
mlx5_devlink_eswitch_mode_set(dev0)
esw_offloads_devcom_init()
mlx5_devcom_register_component(esw0)
mlx5_devlink_eswitch_mode_set(dev1)
esw_offloads_devcom_init()
mlx5_devcom_register_component(esw1)
mlx5_devcom_send_event()
mlx5_devcom_send_event()
Hence, check whether the eswitches are already un/paired before
free/allocation of resources.
Fixes: 09b278462f16 ("net: devlink: enable parallel ops on netlink interface")
Signed-off-by: Shay Drory <shayd@xxxxxxxxxx>
Reviewed-by: Mark Bloch <mbloch@xxxxxxxxxx>
Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 821c78bab3732..a3daca44f74b1 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -340,6 +340,7 @@ struct mlx5_eswitch {
} params;
struct blocking_notifier_head n_head;
struct dentry *dbgfs;
+ bool paired[MLX5_MAX_PORTS];
};
void esw_offloads_disable(struct mlx5_eswitch *esw);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 5235b5a7b9637..433cdd0a2cf34 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -2827,6 +2827,9 @@ static int mlx5_esw_offloads_devcom_event(int event,
mlx5_eswitch_vport_match_metadata_enabled(peer_esw))
break;
+ if (esw->paired[mlx5_get_dev_index(peer_esw->dev)])
+ break;
+
err = mlx5_esw_offloads_set_ns_peer(esw, peer_esw, true);
if (err)
goto err_out;
@@ -2838,14 +2841,18 @@ static int mlx5_esw_offloads_devcom_event(int event,
if (err)
goto err_pair;
+ esw->paired[mlx5_get_dev_index(peer_esw->dev)] = true;
+ peer_esw->paired[mlx5_get_dev_index(esw->dev)] = true;
mlx5_devcom_set_paired(devcom, MLX5_DEVCOM_ESW_OFFLOADS, true);
break;
case ESW_OFFLOADS_DEVCOM_UNPAIR:
- if (!mlx5_devcom_is_paired(devcom, MLX5_DEVCOM_ESW_OFFLOADS))
+ if (!esw->paired[mlx5_get_dev_index(peer_esw->dev)])
break;
mlx5_devcom_set_paired(devcom, MLX5_DEVCOM_ESW_OFFLOADS, false);
+ esw->paired[mlx5_get_dev_index(peer_esw->dev)] = false;
+ peer_esw->paired[mlx5_get_dev_index(esw->dev)] = false;
mlx5_esw_offloads_unpair(peer_esw);
mlx5_esw_offloads_unpair(esw);
mlx5_esw_offloads_set_ns_peer(esw, peer_esw, false);
