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From: Felipe Balbi <balbi@kernel.org>
To: Peter Chen <peter.chen@nxp.com>, pawell@cadence.com, rogerq@ti.com
Cc: linux-usb@vger.kernel.org, linux-imx@nxp.com,
	gregkh@linuxfoundation.org, jun.li@nxp.com,
	Peter Chen <peter.chen@nxp.com>
Subject: Re: [PATCH 2/3] usb: cdns3: gadget: own the lock wrongly at the suspend routine
Date: Tue, 27 Oct 2020 11:08:16 +0200
Message-ID: <87v9ewc9z3.fsf@kernel.org> (raw)
In-Reply-To: <20201016101659.29482-3-peter.chen@nxp.com>


Hi,

Peter Chen <peter.chen@nxp.com> writes:
> @@ -1783,7 +1780,9 @@ static void cdns3_check_usb_interrupt_proceed(struct cdns3_device *priv_dev,
>  
>  	/* Disconnection detected */
>  	if (usb_ists & (USB_ISTS_DIS2I | USB_ISTS_DISI)) {
> +		spin_unlock(&priv_dev->lock);
>  		cdns3_disconnect_gadget(priv_dev);
> +		spin_lock(&priv_dev->lock);

don't you need to add sparse __releases() an __acquires() markers?

>  		priv_dev->gadget.speed = USB_SPEED_UNKNOWN;
>  		usb_gadget_set_state(&priv_dev->gadget, USB_STATE_NOTATTACHED);
>  		cdns3_hw_reset_eps_config(priv_dev);
> @@ -3266,7 +3265,9 @@ static int cdns3_gadget_suspend(struct cdns3 *cdns, bool do_wakeup)
>  {
>  	struct cdns3_device *priv_dev = cdns->gadget_dev;
>  
> +	spin_unlock(&cdns->lock);
>  	cdns3_disconnect_gadget(priv_dev);
> +	spin_lock(&cdns->lock);

ditto

-- 
balbi

  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-16 10:16 [PATCH 0/3] usb: cdns3: three bug fixes for v5.10 Peter Chen
2020-10-16 10:16 ` [PATCH 1/3] usb: cdns3: gadget: suspicious implicit sign extension Peter Chen
2020-10-27  9:03   ` Felipe Balbi
2020-10-27  9:48     ` Peter Chen
2020-10-27 10:08       ` David Laight
2020-10-27 14:21       ` Alan Stern
2020-10-28  6:41         ` Peter Chen
2020-10-27  9:03   ` Felipe Balbi
2020-10-16 10:16 ` [PATCH 2/3] usb: cdns3: gadget: own the lock wrongly at the suspend routine Peter Chen
2020-10-27  9:08   ` Felipe Balbi
2020-10-27  9:08   ` Felipe Balbi [this message]
2020-10-16 10:16 ` [PATCH 3/3] usb: cdns3: Fix on-chip memory overflow issue Peter Chen
2020-10-27  9:11   ` Felipe Balbi

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