From: Jisheng Zhang <[email protected]> commit 2c832293e09be2f998ea916650927c8ccd5b4b3b upstream.
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 <[email protected]> Fixes: 9b0cdefa4cd5 ("net: mvneta: add ethtool statistics") Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/net/ethernet/marvell/mvneta.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -3058,26 +3058,25 @@ static void mvneta_ethtool_update_stats( 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; } }
