[PATCH 5.13 084/151] net/mlx5: Block switchdev mode while devlink traps are active

Greg Kroah-Hartman
2021-08-16T13:26:08Z

From: Aya Levin <ayal@nvidia.com>

[ Upstream commit c85a6b8feb16c0cdbbc8d9f581c7861c4a9ac351 ]

Since switchdev mode can't support devlink traps, verify there are
no active devlink traps before moving eswitch to switchdev mode. If
there are active traps, prevent the switchdev mode configuration.

Fixes: eb3862a0525d ("net/mlx5e: Enable traps according to link state")
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../ethernet/mellanox/mlx5/core/eswitch_offloads.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index b66e12753f37..d0e4daa55a4a 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -48,6 +48,7 @@
#include "lib/fs_chains.h"
#include "en_tc.h"
#include "en/mapping.h"
+#include "devlink.h"

#define mlx5_esw_for_each_rep(esw, i, rep) \
xa_for_each(&((esw)->offloads.vport_reps), i, rep)
@@ -2984,12 +2985,19 @@ int mlx5_devlink_eswitch_mode_set(struct devlink *devlink, u16 mode,
if (cur_mlx5_mode == mlx5_mode)
goto unlock;

- if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV)
+ if (mode == DEVLINK_ESWITCH_MODE_SWITCHDEV) {
+ if (mlx5_devlink_trap_get_num_active(esw->dev)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Can't change mode while devlink traps are active");
+ err = -EOPNOTSUPP;
+ goto unlock;
+ }
err = esw_offloads_start(esw, extack);
- else if (mode == DEVLINK_ESWITCH_MODE_LEGACY)
+ } else if (mode == DEVLINK_ESWITCH_MODE_LEGACY) {
err = esw_offloads_stop(esw, extack);
- else
+ } else {
err = -EINVAL;
+ }

unlock:
mlx5_esw_unlock(esw);
--
2.30.2