USB: option: silence interrupt errors

Avoid spamming the logs (e.g. with -EPROTO errors) when attempting to
resubmit the interrupt urb while a disconnect of an in-use device is
being processed.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/option.c

@@ -1941,7 +1941,7 @@ static void option_instat_callback(struct urb *urb)
 	} else if (status == -ENOENT || status == -ESHUTDOWN) {
 		dev_dbg(dev, "%s: urb stopped: %d\n", __func__, status);
 	} else
-		dev_err(dev, "%s: error %d\n", __func__, status);
+		dev_dbg(dev, "%s: error %d\n", __func__, status);
 
 	/* Resubmit urb so we continue receiving IRQ data */
 	if (status != -ESHUTDOWN && status != -ENOENT) {