USB: serial: fix sysfs-attribute removal deadlock

[firefly-linux-kernel-4.4.55.git] / drivers / usb / serial / usb-serial.c

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 81fc0dfcfdcf6a073dc408ae7203747b1cd6167b..6d40d56378d77d0a1e4c65f66a2b46cbd81fe396 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1347,10 +1347,12 @@ static int usb_serial_register(struct usb_serial_driver *driver)
 static void usb_serial_deregister(struct usb_serial_driver *device)
 {
        pr_info("USB Serial deregistering driver %s\n", device->description);
+
        mutex_lock(&table_lock);
        list_del(&device->driver_list);
-       usb_serial_bus_deregister(device);
        mutex_unlock(&table_lock);
+
+       usb_serial_bus_deregister(device);
 }
 
 /**