DM USB: xHCI: fix an issue during BULK transfer

When LINK type TRB are received among multiple BULK TRBs, the copying
logic in DM will miss one or more TRBs. This patch is used to fix it.

Tracked-On: #2926
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Signed-off-by: Xiaoguang Wu <xiaoguang.wu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>

Author: xiaoguangwu

devicemodel/hw/platform/usb_pmapper.c

@@ -755,7 +755,7 @@ usb_dev_data(void *pdata, struct usb_data_xfer *xfer, int dir, int epctx)
 	int rc = 0, epid;
 	uint8_t type;
 	int blk_start, data_size, blk_count;
-	int retries = 3, i, buf_idx;
+	int retries = 3, i, j, buf_idx;
 	struct usb_data_xfer_block *b;
 	static const char * const type_str[] = {"CTRL", "ISO", "BULK", "INT"};
 	static const char * const dir_str[] = {"OUT", "IN"};
@@ -810,11 +810,12 @@ usb_dev_data(void *pdata, struct usb_data_xfer *xfer, int dir, int epctx)
 			data_size, dir_str[dir], type_str[type]);
 
 	if (!dir) {
-		for (i = 0, buf_idx = 0; i < blk_count; i++) {
+		for (i = 0, j = 0, buf_idx = 0; j < blk_count; ++i) {
 			b = &xfer->data[(blk_start + i) % USB_MAX_XFER_BLOCKS];
 			if (b->buf) {
 				memcpy(&req->buffer[buf_idx], b->buf, b->blen);
 				buf_idx += b->blen;
+				j++;
 			}
 		}
 	}