can: gs_usb: gs_usb_get_timestamp(): fix endpoint parameter for usb_control_msg_recv()

The 2nd argument of usb_control_msg_recv() is the "endpoint",
usb_control_msg_recv() will internally convert the endpoint into a
pipe with usb_rcvctrlpipe().

In gs_usb_get_timestamp() not the endpoint "0" is passed, but the
pipe. This worked by accident as endpoint is a __u8 and the lowest 8
bits of the pipe are 0. Fix this copy/paste error by using the correct
endpoint of "0".

Fixes: 45dfa45f52e6 ("can: gs_usb: add RX and TX hardware timestamp support")
Link: https://lore.kernel.org/all/20220920100416.959226-2-mkl@pengutronix.de
Cc: John Whittington <git@jbrengineering.co.uk>
Tested-by: John Whittington <git@jbrengineering.co.uk>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c
index 5e0d280..1430368 100644 (file)
--- a/drivers/net/can/usb/gs_usb.c
+++ b/drivers/net/can/usb/gs_usb.c
@@ -386,8 +386,7 @@ static inline int gs_usb_get_timestamp(const struct gs_can *dev,
        __le32 timestamp;
        int rc;
 
-       rc = usb_control_msg_recv(interface_to_usbdev(dev->iface),
-                                 usb_sndctrlpipe(interface_to_usbdev(dev->iface), 0),
+       rc = usb_control_msg_recv(interface_to_usbdev(dev->iface), 0,
                                  GS_USB_BREQ_TIMESTAMP,
                                  USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
                                  dev->channel, 0,