USB: more serial drivers writing after disconnect

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>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/usb/serial/airprime.c b/drivers/usb/serial/airprime.c
index 77bb893bf2e9..f156dba0300f 100644
--- a/drivers/usb/serial/airprime.c
+++ b/drivers/usb/serial/airprime.c
@@ -217,7 +217,10 @@ static void airprime_close(struct usb_serial_port *port, struct file * filp)
         priv->rts_state = 0;
         priv->dtr_state = 0;
 
-        airprime_send_setup(port);
+        mutex_lock(&port->serial->disc_mutex);
+        if (!port->serial->disconnected)
+                airprime_send_setup(port);
+        mutex_lock(&port->serial->disc_mutex);
 
         for (i = 0; i < NUM_READ_URBS; ++i) {
                 usb_kill_urb (priv->read_urbp[i]);