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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Johan Hovold <johan@kernel.org>
Subject: [PATCH 4.9 29/42] USB: serial: quatech2: fix control-request directions
Date:   Mon, 14 Jun 2021 12:27:20 +0200
Message-Id: <20210614102643.632925401@linuxfoundation.org>
In-Reply-To: <20210614102642.700712386@linuxfoundation.org>
References: <20210614102642.700712386@linuxfoundation.org>
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From: Johan Hovold <johan@kernel.org>

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>
---
 drivers/usb/serial/quatech2.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -419,7 +419,7 @@ static void qt2_close(struct usb_serial_
 
 	/* 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);
 
@@ -429,7 +429,7 @@ static void qt2_close(struct usb_serial_
 
 	/* 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);
 
@@ -701,7 +701,7 @@ static int qt2_attach(struct usb_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) {