Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH net-next RFC v4 10/15] net/mlx5: Add support for devlink
 reload action fw activate
To:     Jiri Pirko <jiri@resnulli.us>, Moshe Shemesh <moshe@mellanox.com>
CC:     "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Jiri Pirko <jiri@mellanox.com>, <netdev@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
References: <1600063682-17313-1-git-send-email-moshe@mellanox.com>
 <1600063682-17313-11-git-send-email-moshe@mellanox.com>
 <20200914135442.GJ2236@nanopsycho.orion>
From:   Moshe Shemesh <moshe@nvidia.com>
Message-ID: <565e63b3-2a01-4eba-42d3-f5abc6794ee8@nvidia.com>
Date:   Tue, 15 Sep 2020 15:44:02 +0300
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
 Thunderbird/68.11.0
MIME-Version: 1.0
In-Reply-To: <20200914135442.GJ2236@nanopsycho.orion>
Content-Type: text/plain; charset="utf-8"; format=flowed
Content-Transfer-Encoding: 7bit
Content-Language: en-US
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


On 9/14/2020 4:54 PM, Jiri Pirko wrote:
> Mon, Sep 14, 2020 at 08:07:57AM CEST, moshe@mellanox.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.


> [..]