diff --git a/drivers/usb/gadget/function/f_diag.c b/drivers/usb/gadget/function/f_diag.c
index a172ace814f3..111e1855ed74 100644
--- a/drivers/usb/gadget/function/f_diag.c
+++ b/drivers/usb/gadget/function/f_diag.c
@@ -512,7 +512,6 @@ fail:
 }
 EXPORT_SYMBOL(usb_diag_alloc_req);
 #define DWC3_MAX_REQUEST_SIZE (16 * 1024 * 1024)
-#define CI_MAX_REQUEST_SIZE   (16 * 1024)
 /**
  * usb_diag_request_size - Max request size for controller
  * @ch: Channel handler
@@ -522,16 +521,6 @@ EXPORT_SYMBOL(usb_diag_alloc_req);
  */
 int usb_diag_request_size(struct usb_diag_ch *ch)
 {
-	struct diag_context *ctxt = ch->priv_usb;
-	struct usb_composite_dev *cdev;
-
-	if (!ctxt)
-		return 0;
-
-	cdev = ctxt->cdev;
-	if (cdev->gadget->is_chipidea)
-		return CI_MAX_REQUEST_SIZE;
-
 	return DWC3_MAX_REQUEST_SIZE;
 }
 EXPORT_SYMBOL(usb_diag_request_size);