linux-kernel - Re: [PATCH] usb: typec: Check for ops->exit instead of ops->enter in altmode

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Message-ID: <Y3TSF+2XkejIk8UG@kuha.fi.intel.com>
Date:   Wed, 16 Nov 2022 14:05:43 +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] usb: typec: Check for ops->exit instead of ops->enter in
 altmode_exit

On Mon, Nov 14, 2022 at 05:59:24PM +0100, Sven Peter wrote:
> typec_altmode_exit checks if ops->enter is not NULL but then calls
> ops->exit a few lines below. Fix that and check for the function
> pointer it's about to call instead.
> 
> Fixes: 8a37d87d72f0 ("usb: typec: Bus type for alternate modes")
> Signed-off-by: Sven Peter <sven@...npeter.dev>

No Cc: stable@...?

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

> ---
>  drivers/usb/typec/bus.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/typec/bus.c b/drivers/usb/typec/bus.c
> index 26ea2fdec17d..31c2a3130cad 100644
> --- a/drivers/usb/typec/bus.c
> +++ b/drivers/usb/typec/bus.c
> @@ -134,7 +134,7 @@ int typec_altmode_exit(struct typec_altmode *adev)
>  	if (!adev || !adev->active)
>  		return 0;
>  
> -	if (!pdev->ops || !pdev->ops->enter)
> +	if (!pdev->ops || !pdev->ops->exit)
>  		return -EOPNOTSUPP;
>  
>  	/* Moving to USB Safe State */

thanks,

-- 
heikki