net: dsa: mv88e6xxx: Fix u64 statistics

[ Upstream commit 6e46e2d821bb22b285ae8187959096b65d063b0d ]

The switch maintains u64 counters for the number of octets sent and
received. These are kept as two u32's which need to be combined.  Fix
the combing, which wrongly worked on u16's.

Fixes: 80c4627b2719 ("dsa: mv88x6xxx: Refactor getting a single statistic")
Reported-by: Chris Healy <Chris.Healy@zii.aero>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index eb3804546f1fe990cc0659d83ca2425eb7fc0e43..d045d3cd00a60a493d720dfcfb9425b9d38dee74 100644 (file)
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -884,7 +884,7 @@ static uint64_t _mv88e6xxx_get_ethtool_stat(struct mv88e6xxx_chip *chip,
        default:
                return U64_MAX;
        }
-       value = (((u64)high) << 16) | low;
+       value = (((u64)high) << 32) | low;
        return value;
 }