[PATCH v2] Input: usbtouchscreen - fix control-request directions

[PATCH v2] Input: usbtouchscreen - fix control-request directions

[Johan Hovold]

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 four control requests which erroneously used usb_rcvctrlpipe().

Fixes: 1d3e20236d7a ("[PATCH] USB: usbtouchscreen: unified USB touchscreen driver")
Fixes: 24ced062a296 ("usbtouchscreen: add support for DMC TSC-10/25 devices")
Fixes: 9e3b25837a20 ("Input: usbtouchscreen - add support for e2i touchscreen controller")
Cc: stable@vger.kernel.org      # 2.6.17
Signed-off-by: Johan Hovold <johan@kernel.org>
---

Changes in v2
 - include also the request in e2i_init which did not use USB_DIR_OUT

 drivers/input/touchscreen/usbtouchscreen.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index c847453a03c2..43c521f50c85 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -251,7 +251,7 @@ static int e2i_init(struct usbtouch_usb *usbtouch)
 	int ret;
 	struct usb_device *udev = interface_to_usbdev(usbtouch->interface);
 
-	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 	                      0x01, 0x02, 0x0000, 0x0081,
 	                      NULL, 0, USB_CTRL_SET_TIMEOUT);
 
@@ -531,7 +531,7 @@ static int mtouch_init(struct usbtouch_usb *usbtouch)
 	if (ret)
 		return ret;
 
-	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 	                      MTOUCHUSB_RESET,
 	                      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 	                      1, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
@@ -543,7 +543,7 @@ static int mtouch_init(struct usbtouch_usb *usbtouch)
 	msleep(150);
 
 	for (i = 0; i < 3; i++) {
-		ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
+		ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 				      MTOUCHUSB_ASYNC_REPORT,
 				      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 				      1, 1, NULL, 0, USB_CTRL_SET_TIMEOUT);
@@ -722,7 +722,7 @@ static int dmc_tsc10_init(struct usbtouch_usb *usbtouch)
 	}
 
 	/* start sending data */
-	ret = usb_control_msg(dev, usb_rcvctrlpipe (dev, 0),
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 	                      TSC10_CMD_DATA1,
 	                      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 	                      0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
-- 
2.26.3

Re: [PATCH v2] Input: usbtouchscreen - fix control-request directions

[Dmitry Torokhov]

On Mon, May 24, 2021 at 11:20:48AM +0200, Johan Hovold wrote:
> 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 four control requests which erroneously used usb_rcvctrlpipe().
> 
> Fixes: 1d3e20236d7a ("[PATCH] USB: usbtouchscreen: unified USB touchscreen driver")
> Fixes: 24ced062a296 ("usbtouchscreen: add support for DMC TSC-10/25 devices")
> Fixes: 9e3b25837a20 ("Input: usbtouchscreen - add support for e2i touchscreen controller")
> Cc: stable@vger.kernel.org      # 2.6.17
> Signed-off-by: Johan Hovold <johan@kernel.org>

Applied, thank you.

-- 
Dmitry