linux-kernel - Re: [PATCH] usb: cdnsp: Fixes error: uninitialized symbol 'len'

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Date:   Wed, 5 Apr 2023 19:54:56 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Oliver Neukum <oneukum@...e.com>
Cc:     Pawel Laszczak <pawell@...ence.com>, peter.chen@...nel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] usb: cdnsp: Fixes error: uninitialized symbol 'len'

On Wed, Apr 05, 2023 at 07:41:53PM +0200, Oliver Neukum wrote:
> On 05.04.23 19:23, Greg KH wrote:
> > On Fri, Mar 31, 2023 at 05:06:00AM -0400, Pawel Laszczak wrote:
> 
> > >   {
> > >   	struct usb_ctrlrequest *ctrl = &pdev->setup;
> > > -	int ret = 0;
> > > +	int ret = -EINVAL;
> > >   	u16 len;
> > >   	trace_cdnsp_ctrl_req(ctrl);
> > > @@ -424,7 +424,6 @@ void cdnsp_setup_analyze(struct cdnsp_device *pdev)
> > >   	if (pdev->gadget.state == USB_STATE_NOTATTACHED) {
> > >   		dev_err(pdev->dev, "ERR: Setup detected in unattached state\n");
> > > -		ret = -EINVAL;
> > 
> > That's a nice change, but I don't see the original error here that you
> > are saying this change fixes.
> > 
> > What am I missing?
> 
> The function has this check at its beginning:
> 
>        if (!pdev->gadget_driver)
>                 goto out;

Argh, I missed this at the top of the function.  I was looking further
down, sorry for the noise.

I'll go queue this up now, thanks.

greg k-h