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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2006-04-13 22:27:12 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-21 15:04:09 -0700
commit57845bd104233cb75b9ab3624f7ea7662298bc27 (patch)
tree73ac01088881aa217b07c79a781b7c4412ea85e4 /drivers/usb/serial
parentc10746dbb39d41e5fc27badfebe61448210c426d (diff)
[PATCH] USB: console: fix oops
Prevent NULL dereference when used as a USB-serial console. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/serial')
-rw-r--r--drivers/usb/serial/ftdi_sio.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 986d7622273..1122a0da41c 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1261,7 +1261,6 @@ static void ftdi_shutdown (struct usb_serial *serial)
static int ftdi_open (struct usb_serial_port *port, struct file *filp)
{ /* ftdi_open */
- struct termios tmp_termios;
struct usb_device *dev = port->serial->dev;
struct ftdi_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
@@ -1271,8 +1270,8 @@ static int ftdi_open (struct usb_serial_port *port, struct file *filp)
dbg("%s", __FUNCTION__);
-
- port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+ if (port->tty)
+ port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
/* No error checking for this (will get errors later anyway) */
/* See ftdi_sio.h for description of what is reset */
@@ -1286,7 +1285,8 @@ static int ftdi_open (struct usb_serial_port *port, struct file *filp)
This is same behaviour as serial.c/rs_open() - Kuba */
/* ftdi_set_termios will send usb control messages */
- ftdi_set_termios(port, &tmp_termios);
+ if (port->tty)
+ ftdi_set_termios(port, NULL);
/* FIXME: Flow control might be enabled, so it should be checked -
we have no control of defaults! */
@@ -1867,7 +1867,7 @@ static void ftdi_set_termios (struct usb_serial_port *port, struct termios *old_
err("%s urb failed to set baudrate", __FUNCTION__);
}
/* Ensure RTS and DTR are raised when baudrate changed from 0 */
- if ((old_termios->c_cflag & CBAUD) == B0) {
+ if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) {
set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
}
}