From: Johan Hovold <jhovold@gmail.com>
Date: Fri, 10 Feb 2012 12:20:49 +0000 (+0100)
Subject: USB: serial: fix console error reporting
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=548dd4b6da8a8e428453d55f7fa7b8a46498d147;p=linux-beck.git

USB: serial: fix console error reporting

Do not report errors in write path if port is used as a console as this
may trigger the same error (and error report) resulting in a loop.

Reported-by: Stephen Hemminger <shemminger@vyatta.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index f7403576f99f..e129fcd69fd9 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -217,8 +217,10 @@ retry:
 	clear_bit(i, &port->write_urbs_free);
 	result = usb_submit_urb(urb, GFP_ATOMIC);
 	if (result) {
-		dev_err(&port->dev, "%s - error submitting urb: %d\n",
+		if (!port->port.console) {
+			dev_err(&port->dev, "%s - error submitting urb: %d\n",
 						__func__, result);
+		}
 		set_bit(i, &port->write_urbs_free);
 		spin_lock_irqsave(&port->lock, flags);
 		port->tx_bytes -= count;