usb_wwan: fix error in marking device busy

This fixes two errors:
- the device is busy if a message was recieved even if resubmission fails
- the device is not busy if resubmission fails due to -EPERM

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

1 files changed, 9 insertions, 4 deletions

diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index b004b2a485c..7bd06854f87 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -305,11 +305,16 @@ static void usb_wwan_indat_callback(struct urb *urb)
                 /* Resubmit urb so we continue receiving */
                 if (status != -ESHUTDOWN) {
                         err = usb_submit_urb(urb, GFP_ATOMIC);
-                        if (err && err != -EPERM)
-                                printk(KERN_ERR "%s: resubmit read urb failed. "
-                                       "(%d)", __func__, err);
-                        else
+                        if (err) {
+                                if (err != -EPERM) {
+                                        printk(KERN_ERR "%s: resubmit read urb failed. "
+                                                "(%d)", __func__, err);
+                                        /* busy also in error unless we are killed */
+                                        usb_mark_last_busy(port->serial->dev);
+                                }
+                        } else {
                                 usb_mark_last_busy(port->serial->dev);
+                        }
                 }
 
         }