linux-kernel - Re: [PATCH 12/14] USB: oti6858: fix DMA buffer on stack

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Date:	Mon, 28 Dec 2009 17:51:38 -0500
From:	Andres Salomon <dilinger@...ued.net>
To:	linux-kernel@...r.kernel.org
Cc:	linux-usb@...r.kernel.org
Subject:  Re: [PATCH 12/14] USB: oti6858: fix DMA buffer on stack

On Mon, 28 Dec 2009 17:46:19 -0500
Andres Salomon <dilinger@...ued.net> wrote:

> On Mon, 28 Dec 2009 23:01:56 +0100
> Johan Hovold <jhovold@...il.com> wrote:
> 
> [...]
> > diff --git a/drivers/usb/serial/oti6858.c
> > b/drivers/usb/serial/oti6858.c index c644e26..2ae97e7 100644
> > --- a/drivers/usb/serial/oti6858.c
> > +++ b/drivers/usb/serial/oti6858.c
> > @@ -302,7 +302,7 @@ void send_data(struct work_struct *work)
> >  	struct usb_serial_port *port = priv->port;
> >  	int count = 0, result;
> >  	unsigned long flags;
> > -	unsigned char allow;
> > +	u8 *allow;
> >  
> >  	dbg("%s(port = %d)", __func__, port->number);
> >  
> 
> Erm, am I missing something here?  You're removing a 1 byte
> stack variable and replacing it with a 4 byte (pointer) stack
> variable?  What's the point of that, exactly?
> 

Ok, ignore that, I just figured it out (the usb_control_msg bit). :)


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