linux-kernel - Re: [PATCH net-next RFC v4 01/15] devlink: Add reload action option to devlink reload command

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Date:   Mon, 14 Sep 2020 11:32:34 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Vasundhara Volam <vasundhara-v.volam@...adcom.com>
Cc:     Moshe Shemesh <moshe@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jiri Pirko <jiri@...lanox.com>,
        Netdev <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next RFC v4 01/15] devlink: Add reload action option
 to devlink reload command

Mon, Sep 14, 2020 at 09:08:58AM CEST, vasundhara-v.volam@...adcom.com wrote:
>On Mon, Sep 14, 2020 at 11:39 AM Moshe Shemesh <moshe@...lanox.com> wrote:

[...]


>> @@ -1126,15 +1126,24 @@ mlxsw_devlink_core_bus_device_reload_down(struct devlink *devlink,
>>  }
>>
>>  static int
>> -mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink,
>> -                                       struct netlink_ext_ack *extack)
>> +mlxsw_devlink_core_bus_device_reload_up(struct devlink *devlink, enum devlink_reload_action action,
>> +                                       struct netlink_ext_ack *extack,
>> +                                       unsigned long *actions_performed)
>Sorry for repeating again, for fw_activate action on our device, all
>the driver entities undergo reset asynchronously once user initiates
>"devlink dev reload action fw_activate" and reload_up does not have
>much to do except reporting actions that will be/being performed.
>
>Once reset is complete, the health reporter will be notified using

Hmm, how is the fw reset related to health reporter recovery? Recovery
happens after some error event. I don't believe it is wise to mix it.

Instead, why don't you block in reload_up() until the reset is complete?


>devlink_health_reporter_recovery_done(). Returning from reload_up does
>not guarantee successful activation of firmware. Status of reset will
>be notified to the health reporter via
>devlink_health_reporter_state_update().
>
>I am just repeating this, so I want to know if I am on the same page.
>
>Thanks.

[...]