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net: mvneta: fix trivial cut-off issue in mvneta_ethtool_update_stats

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When s->type is T_REG_64, the high 32bits are lost in val. This patch
fixes this trivial issue.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Fixes: 9b0cdefa4c ("net: mvneta: add ethtool statistics")
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jisheng Zhang 2016-01-20 16:36:25 +08:00 committed by David S. Miller
parent 48189d6aaf
commit 2c832293e0
1 changed files with 4 additions and 5 deletions
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9
drivers/net/ethernet/marvell/mvneta.c
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@ -3242,26 +3242,25 @@ static void mvneta_ethtool_update_stats(struct mvneta_port *pp)
const struct mvneta_statistic *s;
void __iomem *base = pp->base;
u32 high, low, val;
u64 val64;
int i;
for (i = 0, s = mvneta_statistics;
s < mvneta_statistics + ARRAY_SIZE(mvneta_statistics);
s++, i++) {
val = 0;
switch (s->type) {
case T_REG_32:
val = readl_relaxed(base + s->offset);
pp->ethtool_stats[i] += val;
break;
case T_REG_64:
/* Docs say to read low 32-bit then high */
low = readl_relaxed(base + s->offset);
high = readl_relaxed(base + s->offset + 4);
val = (u64)high << 32 | low;
val64 = (u64)high << 32 | low;
pp->ethtool_stats[i] += val64;
break;
}
pp->ethtool_stats[i] += val;
}
}