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| author | Vladislav Zolotarov <vladz@broadcom.com> | 2010-07-21 05:59:14 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-07-21 11:11:55 -0700 |
| commit | d0996faeec8b3ab5bda65074c274bc67baf13501 (patch) | |
| tree | 87d7e5c799e3dc2426c9f4245ebf0c0e17df7007 | |
| parent | a13773a53faa28cf79982601b6fc9ddb0ca45f36 (diff) | |
| download | blackbird-op-linux-d0996faeec8b3ab5bda65074c274bc67baf13501.tar.gz blackbird-op-linux-d0996faeec8b3ab5bda65074c274bc67baf13501.zip | |
bnx2x: Protect statistics ramrod and sequence number
Bug fix: Protect statistics ramrod sending code and a statistics counter update
with a spinlock. Otherwise there was a race condition that would allow sending
a statistics ramrods with the same sequence number or with sequence numbers not
in a natural order, which would cause a FW assert.
Signed-off-by: Vladislav Zolotarov <vladz@broadcom.com>
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/bnx2x_main.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c index 3dc876ce6e1f..b86e47be9967 100644 --- a/drivers/net/bnx2x_main.c +++ b/drivers/net/bnx2x_main.c @@ -3789,6 +3789,8 @@ static void bnx2x_storm_stats_post(struct bnx2x *bp) struct eth_query_ramrod_data ramrod_data = {0}; int i, rc; + spin_lock_bh(&bp->stats_lock); + ramrod_data.drv_counter = bp->stats_counter++; ramrod_data.collect_port = bp->port.pmf ? 1 : 0; for_each_queue(bp, i) @@ -3802,6 +3804,8 @@ static void bnx2x_storm_stats_post(struct bnx2x *bp) bp->spq_left++; bp->stats_pending = 1; } + + spin_unlock_bh(&bp->stats_lock); } } @@ -4367,6 +4371,14 @@ static int bnx2x_storm_stats_update(struct bnx2x *bp) struct host_func_stats *fstats = bnx2x_sp(bp, func_stats); struct bnx2x_eth_stats *estats = &bp->eth_stats; int i; + u16 cur_stats_counter; + + /* Make sure we use the value of the counter + * used for sending the last stats ramrod. + */ + spin_lock_bh(&bp->stats_lock); + cur_stats_counter = bp->stats_counter - 1; + spin_unlock_bh(&bp->stats_lock); memcpy(&(fstats->total_bytes_received_hi), &(bnx2x_sp(bp, func_stats_base)->total_bytes_received_hi), @@ -4394,25 +4406,22 @@ static int bnx2x_storm_stats_update(struct bnx2x *bp) u32 diff; /* are storm stats valid? */ - if ((u16)(le16_to_cpu(xclient->stats_counter) + 1) != - bp->stats_counter) { + if (le16_to_cpu(xclient->stats_counter) != cur_stats_counter) { DP(BNX2X_MSG_STATS, "[%d] stats not updated by xstorm" " xstorm counter (0x%x) != stats_counter (0x%x)\n", - i, xclient->stats_counter, bp->stats_counter); + i, xclient->stats_counter, cur_stats_counter + 1); return -1; } - if ((u16)(le16_to_cpu(tclient->stats_counter) + 1) != - bp->stats_counter) { + if (le16_to_cpu(tclient->stats_counter) != cur_stats_counter) { DP(BNX2X_MSG_STATS, "[%d] stats not updated by tstorm" " tstorm counter (0x%x) != stats_counter (0x%x)\n", - i, tclient->stats_counter, bp->stats_counter); + i, tclient->stats_counter, cur_stats_counter + 1); return -2; } - if ((u16)(le16_to_cpu(uclient->stats_counter) + 1) != - bp->stats_counter) { + if (le16_to_cpu(uclient->stats_counter) != cur_stats_counter) { DP(BNX2X_MSG_STATS, "[%d] stats not updated by ustorm" " ustorm counter (0x%x) != stats_counter (0x%x)\n", - i, uclient->stats_counter, bp->stats_counter); + i, uclient->stats_counter, cur_stats_counter + 1); return -4; } |
