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Date: Mon, 26 Nov 2007 14:18:52 -0800 From: Andrew Morton <akpm@...ux-foundation.org> To: bbpetkov@...oo.de Cc: lucy@...span.com, greg@...ah.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH] keyspan: init termios properly On Sun, 18 Nov 2007 14:11:30 +0100 Borislav Petkov <bbpetkov@...oo.de> wrote: > 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. I'll merge revert-keyspan-init-termios-properly.patch soon, but afaik we are still awaiting the real fix for this problem? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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