linux-kernel - Re: [PATCH v4 net-next 4/6] net: ethernet: ti: am65-cpsw: Add suspend/resume support

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Message-ID: <c41064a1-9da7-d848-6f9f-e1f3b722c063@kernel.org>
Date:   Thu, 1 Dec 2022 13:44:28 +0200
From:   Roger Quadros <rogerq@...nel.org>
To:     Paolo Abeni <pabeni@...hat.com>, davem@...emloft.net,
        maciej.fijalkowski@...el.com, kuba@...nel.org
Cc:     andrew@...n.ch, edumazet@...gle.com, vigneshr@...com,
        linux-omap@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 net-next 4/6] net: ethernet: ti: am65-cpsw: Add
 suspend/resume support

Hi,

On 01/12/2022 13:40, Paolo Abeni wrote:
> On Tue, 2022-11-29 at 15:34 +0200, Roger Quadros wrote:
>> @@ -555,11 +556,26 @@ static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
>>  	struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
>>  	struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
>>  	int ret, i;
>> +	u32 reg;
>>  
>>  	ret = pm_runtime_resume_and_get(common->dev);
>>  	if (ret < 0)
>>  		return ret;
>>  
>> +	/* Idle MAC port */
>> +	cpsw_sl_ctl_set(port->slave.mac_sl, CPSW_SL_CTL_CMD_IDLE);
>> +	cpsw_sl_wait_for_idle(port->slave.mac_sl, 100);
>> +	cpsw_sl_ctl_reset(port->slave.mac_sl);
>> +
>> +	/* soft reset MAC */
>> +	cpsw_sl_reg_write(port->slave.mac_sl, CPSW_SL_SOFT_RESET, 1);
>> +	mdelay(1);
>> +	reg = cpsw_sl_reg_read(port->slave.mac_sl, CPSW_SL_SOFT_RESET);
>> +	if (reg) {
>> +		dev_err(common->dev, "soft RESET didn't complete\n");
> 
> I *think* Andrew was asking for dev_dbg() here, but let's see what he
> has to say :)

In the earlier revision we were not exiting with error, so dev_dbg()
was more appropriate there.
In this revision we error out so I thought dev_err() was ok.

--
cheers,
-roger