Messages in this thread Patch in this message | | | From | "Robert White" <> | Subject | [PATCH] (linux 2.4.25) hangup on disconnect for usbserial module | Date | Sun, 4 Apr 2004 21:46:52 -0700 |
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This is "reasonably well tested" on the x86 platform.
This patch fixes a problem where the usbserial code would not notify connected programs that the serial port was going away.
--- linux-2.4.25-orig/drivers/usb/serial/usbserial.c 2003-11-28 10:26:20.000000000 -0800 +++ linux-2.4.25/drivers/usb/serial/usbserial.c 2004-04-04 21:26:34.000000000 -0700 @@ -14,6 +14,10 @@ * * See Documentation/usb/usb-serial.txt for more information on using this driver * + * (04/04/2004) rwhite@casabyte.com + * usb_serial_disconnect() now calls tty_hangup() so that programs + * using the device can/will notice that the device is going away. + * * (10/10/2001) gkh * usb_serial_disconnect() now sets the serial->dev pointer is to NULL to * help prevent child drivers from accessing the device since it is now @@ -1404,9 +1408,11 @@ static void usb_serial_disconnect(struct for (i = 0; i < serial->num_ports; ++i) { port = &serial->port[i]; down (&port->sem); - if (port->tty != NULL) + if (port->tty != NULL) { + tty_hangup(port->tty); while (port->open_count > 0) __serial_close(port, NULL); + } up (&port->sem); }
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