From: Johan Hovold <jhovold@gmail.com>
Date: Sun, 29 Dec 2013 18:23:02 +0000 (+0100)
Subject: USB: pl2303: add error handling to set_control_lines
X-Git-Tag: firefly_0821_release~176^2~4624^2~80
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a6ec8245bf09fd51a0561ff372a12473b48d269b;p=firefly-linux-kernel-4.4.55.git

USB: pl2303: add error handling to set_control_lines

Add error handling to set_control_lines.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 4058ceec884d..1fe8545e9926 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -269,12 +269,13 @@ static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
 	struct usb_device *dev = port->serial->dev;
 	int retval;
 
+	dev_dbg(&port->dev, "%s - %02x\n", __func__, value);
+
 	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 				 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
 				 value, 0, NULL, 0, 100);
-
-	dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
-		value, retval);
+	if (retval)
+		dev_err(&port->dev, "%s - failed: %d\n", __func__, retval);
 
 	return retval;
 }