USB: mos7840: remove invalid disconnect handling

Remove private zombie flag used to signal disconnect and to prevent
control urb from being submitted from interrupt urb completion handler.

The control urb will not be re-submitted as both the control urb and the
interrupt urb is killed on disconnect.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index f2c4bb709747a546406184cccf6c08d42e192753..84f8c106e5e904ed9d379b25339879336f753c27 100644 (file)
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -222,7 +222,6 @@ struct moschip_port {
        __u8 shadowMCR;         /* last MCR value received */
        char open;
        char open_ports;
-       char zombie;
        wait_queue_head_t wait_chase;   /* for handling sleeping while waiting for chase to finish */
        wait_queue_head_t delta_msr_wait;       /* for handling sleeping while waiting for msr change to happen */
        int delta_msr_cond;
@@ -674,14 +673,7 @@ static void mos7840_interrupt_callback(struct urb *urb)
                                        wreg = MODEM_STATUS_REGISTER;
                                        break;
                                }
-                               spin_lock(&mos7840_port->pool_lock);
-                               if (!mos7840_port->zombie) {
-                                       rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
-                               } else {
-                                       spin_unlock(&mos7840_port->pool_lock);
-                                       return;
-                               }
-                               spin_unlock(&mos7840_port->pool_lock);
+                               rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
                        }
                }
        }
@@ -2598,9 +2590,6 @@ static void mos7840_disconnect(struct usb_serial *serial)
        for (i = 0; i < serial->num_ports; ++i) {
                mos7840_port = mos7840_get_port_private(serial->port[i]);
                if (mos7840_port) {
-                       spin_lock_irqsave(&mos7840_port->pool_lock, flags);
-                       mos7840_port->zombie = 1;
-                       spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
                        usb_kill_urb(mos7840_port->control_urb);
                }
        }