USB: race fixes for usb-serial, step 3

- fix an error code returned if a device has been disconnected

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 685fb69..6bf22a2 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -281,7 +281,7 @@ static void serial_close(struct tty_struct *tty, struct file * filp)
 static int serial_write (struct tty_struct * tty, const unsigned char *buf, int count)
 {
        struct usb_serial_port *port = tty->driver_data;
-       int retval = -EINVAL;
+       int retval = -ENODEV;
 
        if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED)
                goto exit;
@@ -289,6 +289,7 @@ static int serial_write (struct tty_struct * tty, const unsigned char *buf, int
        dbg("%s - port %d, %d byte(s)", __FUNCTION__, port->number, count);
 
        if (!port->open_count) {
+               retval = -EINVAL;
                dbg("%s - port not opened", __FUNCTION__);
                goto exit;
        }