greybus: es2: Send cport-id in wValue field to usb_control_msg()

wIndex field has a special meaning, as that can be used by the core to
index into the possible USB interfaces. And that specifically broke with
gbsim, as it has a single USB interface.

Other similar requests (REQUEST_LATENCY_TAG_{EN|DIS}) are already using
wValue field for passing cport-id.

Fix cport_reset() by sending the cport-id in wValue field instead of
wIndex.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

diff --git a/drivers/staging/greybus/es2.c b/drivers/staging/greybus/es2.c
index c1a6fe4..a0e2037 100644 (file)
--- a/drivers/staging/greybus/es2.c
+++ b/drivers/staging/greybus/es2.c
@@ -440,7 +440,7 @@ static int cport_reset(struct gb_host_device *hd, u16 cport_id)
        retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
                                 REQUEST_RESET_CPORT,
                                 USB_DIR_OUT | USB_TYPE_VENDOR |
-                                USB_RECIP_INTERFACE, 0, cport_id,
+                                USB_RECIP_INTERFACE, cport_id, 0,
                                 NULL, 0, ES2_TIMEOUT);
        if (retval < 0) {
                dev_err(&udev->dev, "failed to reset cport %hu: %d\n", cport_id,