linux-kernel - [PATCH net-next v3 2/5] mlxsw: core: fix mlxsw_devlink_info

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Message-Id: <20221127130919.638324-3-mailhol.vincent@wanadoo.fr>
Date:   Sun, 27 Nov 2022 22:09:16 +0900
From:   Vincent Mailhol <mailhol.vincent@...adoo.fr>
To:     Jiri Pirko <jiri@...dia.com>, netdev@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
        Boris Brezillon <bbrezillon@...nel.org>,
        Arnaud Ebalard <arno@...isbad.org>,
        Srujana Challa <schalla@...vell.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Michael Chan <michael.chan@...adcom.com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Dimitris Michailidis <dmichail@...gible.com>,
        Yisen Zhuang <yisen.zhuang@...wei.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        Sunil Goutham <sgoutham@...vell.com>,
        Linu Cherian <lcherian@...vell.com>,
        Geetha sowjanya <gakula@...vell.com>,
        Jerin Jacob <jerinj@...vell.com>,
        hariprasad <hkelam@...vell.com>,
        Subbaraya Sundeep <sbhatta@...vell.com>,
        Taras Chornyi <tchornyi@...vell.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Ido Schimmel <idosch@...dia.com>,
        Petr Machata <petrm@...dia.com>,
        Simon Horman <simon.horman@...igine.com>,
        Shannon Nelson <snelson@...sando.io>, drivers@...sando.io,
        Ariel Elior <aelior@...vell.com>,
        Manish Chopra <manishc@...vell.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Vadim Fedorenko <vadfed@...com>,
        Richard Cochran <richardcochran@...il.com>,
        Vadim Pasternak <vadimp@...lanox.com>,
        Shalom Toledo <shalomt@...lanox.com>,
        linux-crypto@...r.kernel.org, intel-wired-lan@...ts.osuosl.org,
        linux-rdma@...r.kernel.org, oss-drivers@...igine.com,
        Jiri Pirko <jiri@...lanox.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Hao Chen <chenhao288@...ilicon.com>,
        Guangbin Huang <huangguangbin2@...wei.com>,
        Minghao Chi <chi.minghao@....com.cn>,
        Shijith Thotton <sthotton@...vell.com>,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next v3 2/5] mlxsw: core: fix mlxsw_devlink_info_get() to correctly report driver name

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@...lanox.com>
CC: Ido Schimmel <idosch@...lanox.com>
CC: Vadim Pasternak <vadimp@...lanox.com>
Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.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