linux-kernel - Re: [PATCH 15/15] usb: typec: tcpm/tcpci_maxim: use device managed TCPCI port deregistration

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <Zqox0KNoLwvMFMKL@kuha.fi.intel.com>
Date: Wed, 31 Jul 2024 15:45:04 +0300
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: André Draszik <andre.draszik@...aro.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Peter Griffin <peter.griffin@...aro.org>,
	Tudor Ambarus <tudor.ambarus@...aro.org>,
	Will McVicker <willmcvicker@...gle.com>,
	Badhri Jagan Sridharan <badhri@...gle.com>, kernel-team@...roid.com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 15/15] usb: typec: tcpm/tcpci_maxim: use device managed
 TCPCI port deregistration

On Wed, Jul 10, 2024 at 11:36:22AM +0100, André Draszik wrote:
> Instead of open-coding the call to tcpci_unregister_port() in various
> places, let's just register a hook using devm_add_action_or_reset() so
> that it gets called automatically as and when necessary by the device
> management APIs.
> 
> Signed-off-by: André Draszik <andre.draszik@...aro.org>

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

> ---
>  drivers/usb/typec/tcpm/tcpci_maxim_core.c | 30 ++++++++++++++----------------
>  1 file changed, 14 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpci_maxim_core.c b/drivers/usb/typec/tcpm/tcpci_maxim_core.c
> index ee3e86797f17..7abfd29b4b01 100644
> --- a/drivers/usb/typec/tcpm/tcpci_maxim_core.c
> +++ b/drivers/usb/typec/tcpm/tcpci_maxim_core.c
> @@ -472,6 +472,11 @@ static bool max_tcpci_attempt_vconn_swap_discovery(struct tcpci *tcpci, struct t
>  	return true;
>  }
>  
> +static void max_tcpci_unregister_tcpci_port(void *tcpci)
> +{
> +	tcpci_unregister_port(tcpci);
> +}
> +
>  static int max_tcpci_probe(struct i2c_client *client)
>  {
>  	int ret;
> @@ -515,27 +520,21 @@ static int max_tcpci_probe(struct i2c_client *client)
>  		return dev_err_probe(&client->dev, PTR_ERR(chip->tcpci),
>  				     "TCPCI port registration failed\n");
>  
> +        ret = devm_add_action_or_reset(&client->dev,
> +				       max_tcpci_unregister_tcpci_port,
> +				       chip->tcpci);
> +        if (ret)
> +                return ret;
> +
>  	chip->port = tcpci_get_tcpm_port(chip->tcpci);
> +
>  	ret = max_tcpci_init_alert(chip, client);
>  	if (ret < 0)
> -		goto unreg_port;
> +		return dev_err_probe(&client->dev, ret,
> +				     "IRQ initialization failed\n");
>  
>  	device_init_wakeup(chip->dev, true);
>  	return 0;
> -
> -unreg_port:
> -	tcpci_unregister_port(chip->tcpci);
> -
> -	return dev_err_probe(&client->dev, ret,
> -			     "Maxim TCPCI driver initialization failed\n");
> -}
> -
> -static void max_tcpci_remove(struct i2c_client *client)
> -{
> -	struct max_tcpci_chip *chip = i2c_get_clientdata(client);
> -
> -	if (!IS_ERR_OR_NULL(chip->tcpci))
> -		tcpci_unregister_port(chip->tcpci);
>  }
>  
>  static const struct i2c_device_id max_tcpci_id[] = {
> @@ -558,7 +557,6 @@ static struct i2c_driver max_tcpci_i2c_driver = {
>  		.of_match_table = of_match_ptr(max_tcpci_of_match),
>  	},
>  	.probe = max_tcpci_probe,
> -	.remove = max_tcpci_remove,
>  	.id_table = max_tcpci_id,
>  };
>  module_i2c_driver(max_tcpci_i2c_driver);
> 
> -- 
> 2.45.2.803.g4e1b14247a-goog

-- 
heikki