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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>
This commit is contained in:
Jeremiah Mahler 2015-01-11 05:42:06 -08:00 committed by Johan Hovold
parent 32a4bf2e81
commit aa8e22128b
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/serial/generic.c
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@ -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;
}