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USB: more serial drivers writing after disconnect

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this covers the rest of the obvious cases by using the flags
and locks to guard against disconnect which were introduced
in the earlier patch against mos7720.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Oliver Neukum
2008-01-22 13:56:18 +01:00
committed by Greg Kroah-Hartman
parent e33fe4d86f
commit 95bef012ea
5 changed files with 24 additions and 9 deletions
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4
drivers/usb/serial/ftdi_sio.c
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@ -1198,7 +1198,8 @@ static void ftdi_close (struct usb_serial_port *port, struct file *filp)
dbg("%s", __FUNCTION__);
if (c_cflag & HUPCL){
mutex_lock(&port->serial->disc_mutex);
if (c_cflag & HUPCL && !port->serial->disconnected){
/* Disable flow control */
if (usb_control_msg(port->serial->dev,
usb_sndctrlpipe(port->serial->dev, 0),
@ -1212,6 +1213,7 @@ static void ftdi_close (struct usb_serial_port *port, struct file *filp)
/* drop RTS and DTR */
clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);
} /* Note change no line if hupcl is off */
mutex_unlock(&port->serial->disc_mutex);
/* cancel any scheduled reading */
cancel_delayed_work(&priv->rx_work);