usb: gadget: Use correct endianness of the wLength field for WebUSB

WebUSB code uses wLength directly without proper endianness conversion.
Update it to use already prepared temporary variable w_length instead.

Fixes: 93c473948c58 ("usb: gadget: add WebUSB landing page support")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-By: Jó Ágila Bitsch <jgilab@gmail.com>
Link: https://lore.kernel.org/r/20230313154522.52684-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index fa7dd6c..5377d87 100644 (file)
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -2079,10 +2079,9 @@ unknown:
                                sizeof(url_descriptor->URL)
                                - WEBUSB_URL_DESCRIPTOR_HEADER_LENGTH + landing_page_offset);
 
-                       if (ctrl->wLength < WEBUSB_URL_DESCRIPTOR_HEADER_LENGTH
-                                           + landing_page_length)
-                               landing_page_length = ctrl->wLength
-                                       - WEBUSB_URL_DESCRIPTOR_HEADER_LENGTH + landing_page_offset;
+                       if (w_length < WEBUSB_URL_DESCRIPTOR_HEADER_LENGTH + landing_page_length)
+                               landing_page_length = w_length
+                               - WEBUSB_URL_DESCRIPTOR_HEADER_LENGTH + landing_page_offset;
 
                        memcpy(url_descriptor->URL,
                                cdev->landing_page + landing_page_offset,