Merge branch 'net-txgbe-fix-two-bugs-in-txgbe_calc_eeprom_checksum'

YueHaibing says:

====================
net: txgbe: Fix two bugs in txgbe_calc_eeprom_checksum

Fix memleak and unsigned comparison bugs in txgbe_calc_eeprom_checksum
====================

Link: https://lore.kernel.org/r/20221105080722.20292-1-yuehaibing@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/wangxun/txgbe/txgbe_hw.c

@@ -183,6 +183,7 @@ static int txgbe_calc_eeprom_checksum(struct txgbe_hw *hw, u16 *checksum)
 						  eeprom_ptrs);
 		if (status != 0) {
 			wx_err(wxhw, "Failed to read EEPROM image\n");
+			kvfree(eeprom_ptrs);
 			return status;
 		}
 		local_buffer = eeprom_ptrs;
@@ -196,13 +197,14 @@ static int txgbe_calc_eeprom_checksum(struct txgbe_hw *hw, u16 *checksum)
 		if (i != wxhw->eeprom.sw_region_offset + TXGBE_EEPROM_CHECKSUM)
 			*checksum += local_buffer[i];
 
-	*checksum = TXGBE_EEPROM_SUM - *checksum;
-	if (*checksum < 0)
-		return -EINVAL;
-
 	if (eeprom_ptrs)
 		kvfree(eeprom_ptrs);
 
+	if (*checksum > TXGBE_EEPROM_SUM)
+		return -EINVAL;
+
+	*checksum = TXGBE_EEPROM_SUM - *checksum;
+
 	return 0;
 }