linux-kernel - Re: [PATCH net-next RFC v4 10/15] net/mlx5: Add support for devlink reload action fw activate

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Date:   Tue, 15 Sep 2020 15:44:02 +0300
From:   Moshe Shemesh <moshe@...dia.com>
To:     Jiri Pirko <jiri@...nulli.us>, Moshe Shemesh <moshe@...lanox.com>
CC:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jiri Pirko <jiri@...lanox.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next RFC v4 10/15] net/mlx5: Add support for devlink
 reload action fw activate


On 9/14/2020 4:54 PM, Jiri Pirko wrote:
> Mon, Sep 14, 2020 at 08:07:57AM CEST, moshe@...lanox.com wrote:
>
> [..]
>
>> +static void mlx5_fw_reset_complete_reload(struct mlx5_core_dev *dev)
>> +{
>> +	struct mlx5_fw_reset *fw_reset = dev->priv.fw_reset;
>> +
>> +	/* if this is the driver that initiated the fw reset, devlink completed the reload */
>> +	if (test_bit(MLX5_FW_RESET_FLAGS_PENDING_COMP, &fw_reset->reset_flags)) {
>> +		complete(&fw_reset->done);
>> +	} else {
>> +		mlx5_load_one(dev, false);
>> +		devlink_reload_implicit_actions_performed(priv_to_devlink(dev),
>> +							  DEVLINK_RELOAD_ACTION_LIMIT_LEVEL_NONE,
>> +							  BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT) |
>> +							  BIT(DEVLINK_RELOAD_ACTION_FW_ACTIVATE));
> Hmm, who originated the reset? Devlink_reload of the same devlink
> instance?


Not the same devlink instance for sure. I defer it by the flag above 
MLX5_FW_RESET_FLAG_PENDING_COMP. If the flag set, I set complete to the 
reload_down() waiting for it.


> [..]