corsairpsu_usb_cmd
return corsairpsu_usb_cmd(priv, PSU_CMD_INIT, 3, 0, NULL);
ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_VEND_STR, 0, priv->vendor);
ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_PROD_STR, 0, priv->product);
ret = corsairpsu_usb_cmd(priv, 2, PSU_CMD_SELECT_RAIL, rail, NULL);
return corsairpsu_usb_cmd(priv, 3, cmd, 0, data);