usb_wwan: fix runtime PM in error case

An error in the write code path would permanently disable
runtime PM in this driver

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

diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index 7bd06854f87236735f866809f04915cf00b8cfb0..07cdc6cd1064f8eba6b1f46a4313e90e002eb8f7 100644 (file)
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -261,6 +261,7 @@ int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
                                intfdata->in_flight--;
                                spin_unlock_irqrestore(&intfdata->susp_lock,
                                                       flags);
+                               usb_autopm_put_interface_async(port->serial->interface);
                                continue;
                        }
                }