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tg3: fix 64 bit counter for ethtool stats

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Ethtool stats are 64-bits in length.  net_device_stats members are
unsigned long types.  When gathering information for
a get_ethtool_stats call, the driver will call a driver-private,
inlined get_stat64() function, which returns an unsigned long value.
This call will inadvertently mask off the upper 32-bits of a stat on
32-bit machines.

This patch defines a new get_estat() inline function and modifies the
ESTAT_ADD() macro to use it.

Signed-off-by: Stefan Buehler <stbuehler@web.de>
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefan Buehler 2008-08-15 14:10:54 -07:00 committed by David S. Miller
parent 4ba526ced9
commit 816f8b8662
1 changed files with 6 additions and 1 deletions
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7
drivers/net/tg3.c
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@ -8466,6 +8466,11 @@ static inline unsigned long get_stat64(tg3_stat64_t *val)
return ret;
}
static inline u64 get_estat64(tg3_stat64_t *val)
{
return ((u64)val->high << 32) | ((u64)val->low);
}
static unsigned long calc_crc_errors(struct tg3 *tp)
{
struct tg3_hw_stats *hw_stats = tp->hw_stats;
@ -8494,7 +8499,7 @@ static unsigned long calc_crc_errors(struct tg3 *tp)
#define ESTAT_ADD(member) \
estats->member = old_estats->member + \
get_stat64(&hw_stats->member)
get_estat64(&hw_stats->member)
static struct tg3_ethtool_stats *tg3_get_estats(struct tg3 *tp)
{