linux-kernel - Re: [PATCH 2/4] usb: typec: tipd: Fix spurious fwnode_handle

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Message-ID: <Y3TUrDTZl4jM7C66@kuha.fi.intel.com>
Date:   Wed, 16 Nov 2022 14:16:44 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Sven Peter <sven@...npeter.dev>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] usb: typec: tipd: Fix spurious fwnode_handle_put in
 error path

On Mon, Nov 14, 2022 at 06:44:47PM +0100, Sven Peter wrote:
> The err_role_put error path always calls fwnode_handle_put to release
> the fwnode. This path can be reached after probe itself has already
> released that fwnode though. Fix that by moving fwnode_handle_put in the
> happy path to the very end.
> 
> Fixes: 18a6c866bb19 ("usb: typec: tps6598x: Add USB role switching logic")
> Signed-off-by: Sven Peter <sven@...npeter.dev>

This looks like stable material as well.

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
>  drivers/usb/typec/tipd/core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
> index ebc786d728e2..824e573af570 100644
> --- a/drivers/usb/typec/tipd/core.c
> +++ b/drivers/usb/typec/tipd/core.c
> @@ -834,7 +834,6 @@ static int tps6598x_probe(struct i2c_client *client)
>  		ret = PTR_ERR(tps->port);
>  		goto err_role_put;
>  	}
> -	fwnode_handle_put(fwnode);
>  
>  	if (tps->status & TPS_STATUS_PLUG_PRESENT) {
>  		ret = tps6598x_read16(tps, TPS_REG_POWER_STATUS, &tps->pwr_status);
> @@ -858,6 +857,7 @@ static int tps6598x_probe(struct i2c_client *client)
>  	}
>  
>  	i2c_set_clientdata(client, tps);
> +	fwnode_handle_put(fwnode);
>  
>  	return 0;
>  

thanks,

-- 
heikki