This is a note to let you know that I've just added the patch titled
bnx2x: fix occasional statistics off-by-4GB error
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bnx2x-fix-occasional-statistics-off-by-4gb-error.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8ad67ae1d532940db7bc0fef7cc804c43e8bc903 Mon Sep 17 00:00:00 2001
From: Maciej Żenczykowski <maze@xxxxxxxxxx>
Date: Fri, 15 Mar 2013 11:56:17 +0000
Subject: bnx2x: fix occasional statistics off-by-4GB error
From: Maciej Żenczykowski <maze@xxxxxxxxxx>
[ Upstream commit b009aac12cd0fe34293c68af8ac48b85be3bd858 ]
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 <maze@xxxxxxxxxx>
Cc: Mintz Yuval <yuvalmin@xxxxxxxxxxxx>
Acked-by: Eilon Greenstein <eilong@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.h
@@ -439,8 +439,9 @@ 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) \
Patches currently in stable-queue which might be from maze@xxxxxxxxxx are
queue-3.4/bnx2x-fix-occasional-statistics-off-by-4gb-error.patch
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