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Subject: [PATCH net-next v3 2/5] mlxsw: core: fix mlxsw_devlink_info_get() to correctly report driver name
Date:   Sun, 27 Nov 2022 22:09:16 +0900
Message-Id: <20221127130919.638324-3-mailhol.vincent@wanadoo.fr>
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 <20221127130919.638324-1-mailhol.vincent@wanadoo.fr>
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Currently, mlxsw_devlink_info_get() reports the device_kind. The
device_kind is not necessarily the same as the device_name. For
example, the mlxsw_i2c implementation sets up the device_kind as
ic2_client::name in [1] which indicates the type of the device
(e.g. chip name).

Fix it so that it correctly reports the driver name.

[1] mlxsw_i2c_probe() from drivers/net/ethernet/mellanox/mlxsw/i2c.c
Link: https://elixir.bootlin.com/linux/v6.1-rc1/source/drivers/net/ethernet/mellanox/mlxsw/i2c.c#L714

Fixes: a9c8336f6544 ("mlxsw: core: Add support for devlink info command")
CC: Shalom Toledo <shalomt@mellanox.com>
CC: Ido Schimmel <idosch@mellanox.com>
CC: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
---
 drivers/net/ethernet/mellanox/mlxsw/core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index a83f6bc30072..d8b1bb03cdb0 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -1453,6 +1453,7 @@ mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 		       struct netlink_ext_ack *extack)
 {
 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
+	struct device *dev = mlxsw_core->bus_info->dev;
 	char fw_info_psid[MLXSW_REG_MGIR_FW_INFO_PSID_SIZE];
 	u32 hw_rev, fw_major, fw_minor, fw_sub_minor;
 	char mgir_pl[MLXSW_REG_MGIR_LEN];
@@ -1460,7 +1461,7 @@ mlxsw_devlink_info_get(struct devlink *devlink, struct devlink_info_req *req,
 	int err;
 
 	err = devlink_info_driver_name_put(req,
-					   mlxsw_core->bus_info->device_kind);
+					   dev_driver_string(dev->parent));
 	if (err)
 		return err;
 
-- 
2.37.4