linux-kernel - Re: [PATCH v5 net-next 4/6] net: ethernet: ti: am65-cpsw: Add suspend/resume support

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Date:   Thu, 8 Dec 2022 11:49:48 +0200
From:   Roger Quadros <rogerq@...nel.org>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     davem@...emloft.net, maciej.fijalkowski@...el.com, andrew@...n.ch,
        edumazet@...gle.com, pabeni@...hat.com, vigneshr@...com,
        linux-omap@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 net-next 4/6] net: ethernet: ti: am65-cpsw: Add
 suspend/resume support



On 08/12/2022 06:21, Jakub Kicinski wrote:
> On Tue,  6 Dec 2022 11:44:17 +0200 Roger Quadros wrote:
>>  	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");
>> +		return -ETIMEDOUT;
> 
> Doesn't this function leak power management references on almost all
> error paths? Not really related to this set, tho.

Oh yes it does. I'll send a separate fix.

cheers,
-roger