linux-kernel - Re: [PATCH] keyspan: init termios properly

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Date:	Sun, 18 Nov 2007 14:11:30 +0100
From:	Borislav Petkov <bbpetkov@...oo.de>
To:	Lucy McCoy <lucy@...span.com>
Cc:	Greg KH <greg@...ah.com>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] keyspan: init termios properly

On Thu, Nov 15, 2007 at 01:10:16PM -0800, Lucy McCoy wrote:
 
> static int keyspan_open (struct usb_serial_port *port, struct file *filp)
> {
> 	struct keyspan_port_private 	*p_priv;
> 	struct keyspan_serial_private 	*s_priv;
> 	struct usb_serial 		*serial = port->serial;
> 	const struct keyspan_device_details	*d_details;
> 	int				i, err;
> 	struct urb			*urb;
> 	
> 	s_priv = usb_get_serial_data(serial);
> 	p_priv = usb_get_serial_port_data(port);
> 	d_details = p_priv->device_details;
> 	
> 	dbg("%s - port%d.", __FUNCTION__, port->number); 
> 
> 	/* Set some sane defaults */
> 	p_priv->rts_state = 1;
> 	p_priv->dtr_state = 1;
> 	p_priv->baud = 9600;
> 
> 	/* set CTS/RTS handshake etc. */
> 	p_priv->cflag = CS8;   /* 8/N/1  */
> 	p_priv->flow_control = flow_none;
> 
> 	/* force baud and lcr to be set on open */
> 	p_priv->old_baud = 0;
> 	p_priv->old_cflag = 0;
> 
> 	p_priv->out_flip = 0;
> 	p_priv->in_flip = 0;
> 
> 	/* Reset low level data toggle and start reading from endpoints */
> 	for (i = 0; i < 2; i++) {
> 		if ((urb = p_priv->in_urbs[i]) == NULL)
> 			continue;
> 		urb->dev = serial->dev;
> 
> 		/* make sure endpoint data toggle is synchronized with the device */
> 		
> 		usb_clear_halt(urb->dev, urb->pipe);
> 
> 		if ((err = usb_submit_urb(urb, GFP_KERNEL)) != 0) {
> 			dbg("%s - submit urb %d failed (%d)", __FUNCTION__, i, err);
> 		}
> 	}
> 
> 	/* Reset low level data toggle on out endpoints */
> 	for (i = 0; i < 2; i++) {
> 		if ((urb = p_priv->out_urbs[i]) == NULL)
> 			continue;
> 		urb->dev = serial->dev;
> 		/* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe), 0); */
> 	}
> 
> 	keyspan_send_setup(port, 1);
> 	//mdelay(100);
> 	//keyspan_set_termios(port, NULL);
> 
> 	return (0);
> }
> 

yes, after testing this i can confirm that this one fixes the NULL ptr
problem here so you might want to submit a proper patch to Greg.

-- 
Regards/Gruß,
    Boris.
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