linux-kernel - Re: [PATCH] usb: gadget: core: remove unbalanced mutex_unlock in usb_gadget

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Date:   Mon, 24 Jul 2023 10:26:03 -0400
From:   Alan Stern <stern@...land.harvard.edu>
To:     Michael Grzeschik <m.grzeschik@...gutronix.de>
Cc:     linux-usb@...r.kernel.org, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: Re: [PATCH] usb: gadget: core: remove unbalanced mutex_unlock in
 usb_gadget_activate

On Sat, Jul 22, 2023 at 12:22:56AM +0200, Michael Grzeschik wrote:
> Commit 286d9975a838 ("usb: gadget: udc: core: Prevent soft_connect_store() race")
> introduced one extra mutex_unlock of connect_lock in the usb_gadget_active function.
> 
> Fixes: 286d9975a838 ("usb: gadget: udc: core: Prevent soft_connect_store() race")
> Signed-off-by: Michael Grzeschik <m.grzeschik@...gutronix.de>
> ---

Hard to see how we missed that...

Reviewed-by: Alan Stern <stern@...land.harvard.edu>

Thanks!

>  drivers/usb/gadget/udc/core.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
> index 59188ea065e0c9..cd58f2a4e7f34d 100644
> --- a/drivers/usb/gadget/udc/core.c
> +++ b/drivers/usb/gadget/udc/core.c
> @@ -878,7 +878,6 @@ int usb_gadget_activate(struct usb_gadget *gadget)
>  	 */
>  	if (gadget->connected)
>  		ret = usb_gadget_connect_locked(gadget);
> -	mutex_unlock(&gadget->udc->connect_lock);
>  
>  unlock:
>  	mutex_unlock(&gadget->udc->connect_lock);
> -- 
> 2.39.2
>