[PATCH net-next v4 0/3] net: devlink: return the driver name in devlink_nl_info_fill

[Vincent Mailhol]

The driver name is available in device_driver::name. Right now,
drivers still have to report this piece of information themselves in
their devlink_ops::info_get callback function.

The goal of this series is to have the devlink core to report this
information instead of the drivers.

The first patch fulfills the actual goal of this series: modify
devlink core to report the driver name and clean-up all drivers. Both
have to be done in an atomic change to avoid attribute duplication.

The second patch removes the devlink_info_driver_name_put() function
to prevent future drivers from reporting the driver name themselves.

Finally, the third and last patch allows the core to call
devlink_nl_info_fill() even if the devlink_ops::info_get() callback is
NULL. This allows to do further more clean up in the drivers.
---
* Changelog *

v3 -> v4

  * Ido pointed out that the mlxsw did not need to be fixed:
    https://lore.kernel.org/netdev/Y4ONgD4dAj8yU2%2F+@shredder/
    Remove the first two patches from the series.

v2 -> v3

  * [PATCH 3/5] remove the call to devlink_info_driver_name_put() in
    mlxsw driver as well (this was missing in v2, making the build
    fail... sorry for the noise).

  * add additional people in CC as pointed by netdev patchwork CI:
    https://patchwork.kernel.org/project/netdevbpf/list/?series=699451

  * use the "Link:" prefix before URL to silence checkpatch's line
    length warning.


RFC v1 -> v2

  * drop the RFC tag

  * big rework following the discussion on RFC:
    https://lore.kernel.org/netdev/20221122154934.13937-1-mailhol.vincent@xxxxxxxxxx/
    Went from one patch to a series of five patches:

  * drop the idea to report the USB serial number following Greg's
    comment:
    https://lore.kernel.org/linux-usb/Y3+VfNdt%2FK7UtRcw@xxxxxxxxx/


Vincent Mailhol (3):
  net: devlink: let the core report the driver name instead of the
    drivers
  net: devlink: remove devlink_info_driver_name_put()
  net: devlink: make the devlink_ops::info_get() callback optional

 .../marvell/octeontx2/otx2_cpt_devlink.c      |  4 ---
 drivers/net/dsa/hirschmann/hellcreek.c        |  5 ---
 drivers/net/dsa/mv88e6xxx/devlink.c           |  5 ---
 drivers/net/dsa/sja1105/sja1105_devlink.c     | 12 ++-----
 .../net/ethernet/broadcom/bnxt/bnxt_devlink.c |  4 ---
 .../freescale/dpaa2/dpaa2-eth-devlink.c       | 11 +-----
 .../ethernet/fungible/funeth/funeth_devlink.c |  7 ----
 .../hisilicon/hns3/hns3pf/hclge_devlink.c     |  5 ---
 .../hisilicon/hns3/hns3vf/hclgevf_devlink.c   |  5 ---
 drivers/net/ethernet/intel/ice/ice_devlink.c  |  6 ----
 .../marvell/octeontx2/af/rvu_devlink.c        |  7 ----
 .../marvell/octeontx2/nic/otx2_devlink.c      | 15 --------
 .../marvell/prestera/prestera_devlink.c       |  5 ---
 .../net/ethernet/mellanox/mlx5/core/devlink.c |  4 ---
 drivers/net/ethernet/mellanox/mlxsw/core.c    |  5 ---
 .../net/ethernet/netronome/nfp/nfp_devlink.c  |  4 ---
 .../ethernet/pensando/ionic/ionic_devlink.c   |  4 ---
 drivers/net/ethernet/qlogic/qed/qed_devlink.c |  4 ---
 drivers/net/netdevsim/dev.c                   |  3 --
 drivers/ptp/ptp_ocp.c                         |  4 ---
 include/net/devlink.h                         |  2 --
 net/core/devlink.c                            | 35 ++++++++++++-------
 22 files changed, 26 insertions(+), 130 deletions(-)

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2.25.1