Commit 33c9cfd8 authored Jan 11, 2015 by Jeremiah Mahler Committed by Sasha Levin Apr 27, 2015

usb: serial: silence all non-critical read errors



[ Upstream commit aa8e22128b40590b291cd13512098bf258a7e6c5 ]

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>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

parent 2ca6349b

drivers/usb/serial/generic.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -374,7 +374,7 @@ 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;
		}