[PATCH net 1/2] net: dsa: mv88e6xxx: fix 88E6171 statistics snapshot

[Florian Fainelli <f.fainelli@gmail.com>]

The 88E6171 belongs to the 6351 family and takes the port number in the
low bits of the statistics operation register. The 6320 snapshot helper
instead encodes the port as (port + 1) << 5. On an EA4500, this causes
ethtool -S to return physical port 0's MIB counters for every user port.
Traffic on other ports does not update their reported hardware counters.

Before the snapshot operation was moved into the chip operations, only
the 6320 and 6352 families used the shifted encoding. The refactoring
incorrectly assigned that encoding to the 88E6171 as well.

Use the unshifted snapshot helper for the 88E6171. Tested on an EA4500:
pings through different switch ports now update only the corresponding
port's hardware counters.

Fixes: a605a0fe7115 ("net: dsa: mv88e6xxx: Abstract stats_snapshot into ops structure")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 7f68a0c55802..67daf3b9cb48 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -4610,7 +4610,7 @@ static const struct mv88e6xxx_ops mv88e6171_ops = {
 	.port_disable_pri_override = mv88e6xxx_port_disable_pri_override,
 	.port_get_cmode = mv88e6352_port_get_cmode,
 	.port_setup_message_port = mv88e6xxx_setup_message_port,
-	.stats_snapshot = mv88e6320_g1_stats_snapshot,
+	.stats_snapshot = mv88e6xxx_g1_stats_snapshot,
 	.stats_set_histogram = mv88e6095_g1_stats_set_histogram,
 	.stats_get_sset_count = mv88e6095_stats_get_sset_count,
 	.stats_get_strings = mv88e6095_stats_get_strings,
-- 
2.53.0