[PATCH 4.19 09/32] net: dsa: mv88e6xxx: fix handling of upper half of STATS_TYPE_PORT

Greg Kroah-Hartman
2019-06-03T09:11:12Z

From: Rasmus Villemoes <rasmus.villemoes@prevas.dk>

[ Upstream commit 84b3fd1fc9592d431e23b077e692fa4e3fd0f086 ]

Currently, the upper half of a 4-byte STATS_TYPE_PORT statistic ends
up in bits 47:32 of the return value, instead of bits 31:16 as they
should.

Fixes: 6e46e2d821bb ("net: dsa: mv88e6xxx: Fix u64 statistics")
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/dsa/mv88e6xxx/chip.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -877,7 +877,7 @@ static uint64_t _mv88e6xxx_get_ethtool_s
err = mv88e6xxx_port_read(chip, port, s->reg + 1, &reg);
if (err)
return U64_MAX;
- high = reg;
+ low |= ((u32)reg) << 16;
}
break;
case STATS_TYPE_BANK1: