linux-kernel - Re: [PATCHv3 1/2] usb: USB Type-C connector class

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Message-ID: <20160622215428.GA15297@roeck-us.net>
Date:	Wed, 22 Jun 2016 14:54:28 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Oliver Neukum <oneukum@...e.com>,
	Felipe Balbi <felipe.balbi@...ux.intel.com>,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCHv3 1/2] usb: USB Type-C connector class

Hi,

On Tue, Jun 21, 2016 at 05:51:50PM +0300, Heikki Krogerus wrote:
> The purpose of USB Type-C connector class is to provide
> unified interface for the user space to get the status and
> basic information about USB Type-C connectors on a system,
> control over data role swapping, and when USB PD is
> available, also control over power role swapping and
> Alternate Modes.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> ---
[ ... ]

> +
> +static void typec_remove_partner(struct typec_port *port)
> +{
> +	WARN_ON(port->partner->alt_modes);

You are setting partner->alt_modes in typec_register_altmodes(),
but you don't clear it in typec_unregister_altmodes().

Does this work for you ? I always get the warning when I remove a cable.

Thanks,
Guenter