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

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Date:   Wed, 7 Dec 2022 20:21:20 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Roger Quadros <rogerq@...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 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.