USB: serial: quatech2: fix control-request directions

commit eb8dbe80326c3d44c1e38ee4f40e0d8d3e06f2d0 upstream.

The direction of the pipe argument must match the request-type direction
bit or control requests may fail depending on the host-controller-driver
implementation.

Fix the three requests which erroneously used usb_rcvctrlpipe().

Fixes: f7a33e608d9a ("USB: serial: add quatech2 usb to serial driver")
Cc: stable@vger.kernel.org      # 3.5
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index 9ae57a9..d212c80 100644 (file)
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -416,7 +416,7 @@ static void qt2_close(struct usb_serial_port *port)
 
        /* flush the port transmit buffer */
        i = usb_control_msg(serial->dev,
-                           usb_rcvctrlpipe(serial->dev, 0),
+                           usb_sndctrlpipe(serial->dev, 0),
                            QT2_FLUSH_DEVICE, 0x40, 1,
                            port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
 
@@ -426,7 +426,7 @@ static void qt2_close(struct usb_serial_port *port)
 
        /* flush the port receive buffer */
        i = usb_control_msg(serial->dev,
-                           usb_rcvctrlpipe(serial->dev, 0),
+                           usb_sndctrlpipe(serial->dev, 0),
                            QT2_FLUSH_DEVICE, 0x40, 0,
                            port_priv->device_port, NULL, 0, QT2_USB_TIMEOUT);
 
@@ -693,7 +693,7 @@ static int qt2_attach(struct usb_serial *serial)
        int status;
 
        /* power on unit */
-       status = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+       status = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
                                 0xc2, 0x40, 0x8000, 0, NULL, 0,
                                 QT2_USB_TIMEOUT);
        if (status < 0) {