USB: Error handling bug fix for serial_open()

From: Richard Pearman <[email protected]>
From: Greg Breen <[email protected]>

When an error occurs in serial_open() ensure that port->tty and tty->driver_data are set to NULL, if previously assigned a value in the function.

---

@@ -230,6 +230,8 @@ bailout_module_put:
    module_put(serial->type->driver.owner);

bailout_mutex_unlock:

    port->open_count = 0;
+    port->tty = NULL;
+    tty->driver_data = NULL;   
    mutex_unlock(&port->mutex);
bailout_kref_put:
    kref_put(&serial->kref, destroy_serial);

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title:Senior embedded systems engineer
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This has already been fixed in newer kernel versions.

Thanks for the patch though.

greg k-h