Revert "bnxt: Search VPD with pci_vpd_find_ro_info_keyword()"

This reverts commit 58a9b5d2.
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -13174,8 +13174,8 @@ static int bnxt_init_mac_addr(struct bnxt *bp)
 static void bnxt_vpd_read_info(struct bnxt *bp)
 {
 	struct pci_dev *pdev = bp->pdev;
-	unsigned int vpd_size, kw_len;
-	int pos, size;
+	int i, len, pos, ro_size, size;
+	unsigned int vpd_size;
 	u8 *vpd_data;
 
 	vpd_data = pci_vpd_alloc(pdev, &vpd_size);
@@ -13184,22 +13184,42 @@ static void bnxt_vpd_read_info(struct bnxt *bp)
 		return;
 	}
 
-	pos = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
-					   PCI_VPD_RO_KEYWORD_PARTNO, &kw_len);
+	i = pci_vpd_find_tag(vpd_data, vpd_size, PCI_VPD_LRDT_RO_DATA);
+	if (i < 0) {
+		netdev_err(bp->dev, "VPD READ-Only not found\n");
+		goto exit;
+	}
+
+	ro_size = pci_vpd_lrdt_size(&vpd_data[i]);
+	i += PCI_VPD_LRDT_TAG_SIZE;
+	if (i + ro_size > vpd_size)
+		goto exit;
+
+	pos = pci_vpd_find_info_keyword(vpd_data, i, ro_size,
+					PCI_VPD_RO_KEYWORD_PARTNO);
 	if (pos < 0)
 		goto read_sn;
 
-	size = min_t(int, kw_len, BNXT_VPD_FLD_LEN - 1);
+	len = pci_vpd_info_field_size(&vpd_data[pos]);
+	pos += PCI_VPD_INFO_FLD_HDR_SIZE;
+	if (len + pos > vpd_size)
+		goto read_sn;
+
+	size = min(len, BNXT_VPD_FLD_LEN - 1);
 	memcpy(bp->board_partno, &vpd_data[pos], size);
 
 read_sn:
-	pos = pci_vpd_find_ro_info_keyword(vpd_data, vpd_size,
-					   PCI_VPD_RO_KEYWORD_SERIALNO,
-					   &kw_len);
+	pos = pci_vpd_find_info_keyword(vpd_data, i, ro_size,
+					PCI_VPD_RO_KEYWORD_SERIALNO);
 	if (pos < 0)
 		goto exit;
 
-	size = min_t(int, kw_len, BNXT_VPD_FLD_LEN - 1);
+	len = pci_vpd_info_field_size(&vpd_data[pos]);
+	pos += PCI_VPD_INFO_FLD_HDR_SIZE;
+	if (len + pos > vpd_size)
+		goto exit;
+
+	size = min(len, BNXT_VPD_FLD_LEN - 1);
 	memcpy(bp->board_serialno, &vpd_data[pos], size);
 exit:
 	kfree(vpd_data);