Commit aa8e2212 authored Jan 11, 2015 by Jeremiah Mahler Committed by Johan Hovold Jan 12, 2015

usb: serial: silence all non-critical read errors



If a USB serial device is unplugged while there is an active program
using the device it may spam the logs with -EPROTO (71) messages as it
attempts to retry.

Most serial usb drivers (metro-usb, pl2303, mos7840, ...) only output
these messages for debugging.  The generic driver treats these as
errors.

Change the default output for the generic serial driver from error to
debug to silence these non-critical errors.

Signed-off-by: Jeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>

parent 32a4bf2e

drivers/usb/serial/generic.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -373,7 +373,7 @@ void usb_serial_generic_read_bulk_callback(struct urb *urb)
		__func__, urb->status);
		return;
		default:
		dev_err(&port->dev, "%s - nonzero urb status: %d\n",
		dev_dbg(&port->dev, "%s - nonzero urb status: %d\n",
		__func__, urb->status);
		goto resubmit;
		}

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