3.5.7.9 -stable review patch. If anyone has any objections, please let me know.
------------------
From: =?UTF-8?q?Maciej=20=C5=BBenczykowski?= <m...@google.com>
commit b009aac12cd0fe34293c68af8ac48b85be3bd858 upstream.
The UPDATE_QSTAT function introduced on February 15, 2012
in commit 1355b704b9ba "bnx2x: consistent statistics after
internal driver reload" incorrectly fails to handle overflow
during addition of the lower 32-bit field of a stat.
This bug is present since 3.4-rc1 and should thus be considered
a candidate for stable 3.4+ releases.
Google-Bug-Id: 8374428
Signed-off-by: Maciej Żenczykowski <m...@google.com>
Cc: Mintz Yuval <yuval...@broadcom.com>
Acked-by: Eilon Greenstein <eil...@broadcom.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriq...@canonical.com>
---
drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.h
b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.h
index 93e689fd..c664a61 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.h
@@ -451,8 +451,9 @@ struct bnx2x_fw_port_stats_old {
#define UPDATE_QSTAT(s, t) \
do { \
- qstats->t##_hi = qstats_old->t##_hi + le32_to_cpu(s.hi); \
qstats->t##_lo = qstats_old->t##_lo + le32_to_cpu(s.lo); \
+ qstats->t##_hi = qstats_old->t##_hi + le32_to_cpu(s.hi) \
+ + ((qstats->t##_lo < qstats_old->t##_lo) ? 1 : 0); \
} while (0)
#define UPDATE_QSTAT_OLD(f) \
--
1.8.1.2
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