This is a note to let you know that I've just added the patch titled USB: serial: quatech2: fix control-request directions to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-serial-quatech2-fix-control-request-directions.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From eb8dbe80326c3d44c1e38ee4f40e0d8d3e06f2d0 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan@xxxxxxxxxx> Date: Mon, 24 May 2021 11:17:05 +0200 Subject: USB: serial: quatech2: fix control-request directions From: Johan Hovold <johan@xxxxxxxxxx> 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@xxxxxxxxxxxxxxx # 3.5 Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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 @@ -416,7 +416,7 @@ 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); @@ -426,7 +426,7 @@ 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); @@ -670,7 +670,7 @@ 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) { Patches currently in stable-queue which might be from johan@xxxxxxxxxx are queue-5.4/usb-serial-quatech2-fix-control-request-directions.patch queue-5.4/usb-serial-ftdi_sio-add-novatech-orionmx-product-id.patch queue-5.4/usb-serial-omninet-add-device-id-for-zyxel-omni-56k-plus.patch queue-5.4/usb-serial-cp210x-fix-alternate-function-for-cp2102n-qfn20.patch