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| author | Eric Dumazet <edumazet@google.com> | 2013-05-13 02:24:11 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-05-14 13:02:30 -0700 |
| commit | faff57a92ba1d7247c5e86ecea2886d2c9d54507 (patch) | |
| tree | 8e9fbdb7e277f538867bffa5f2bf6588310f4e09 /net | |
| parent | a3659aa09a2ee7e0028349b9100d8b4a7750a4be (diff) | |
| download | linux-faff57a92ba1d7247c5e86ecea2886d2c9d54507.tar.gz linux-faff57a92ba1d7247c5e86ecea2886d2c9d54507.tar.bz2 linux-faff57a92ba1d7247c5e86ecea2886d2c9d54507.zip | |
net/802/mrp: fix lockdep splat
commit fb745e9a037895 ("net/802/mrp: fix possible race condition when
calling mrp_pdu_queue()") introduced a lockdep splat.
[ 19.735147] =================================
[ 19.735235] [ INFO: inconsistent lock state ]
[ 19.735324] 3.9.2-build-0063 #4 Not tainted
[ 19.735412] ---------------------------------
[ 19.735500] inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
[ 19.735592] rmmod/1840 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 19.735682] (&(&app->lock)->rlock#2){+.?...}, at: [<f862bb5b>]
mrp_uninit_applicant+0x69/0xba [mrp]
app->lock is normally taken under softirq context, so disable BH to
avoid the splat.
Reported-by: Denys Fedoryshchenko <denys@visp.net.lb>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: David Ward <david.ward@ll.mit.edu>
Cc: Cong Wang <amwang@redhat.com>
Tested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/802/mrp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/802/mrp.c b/net/802/mrp.c index e085bcc754f6..1eb05d80b07b 100644 --- a/net/802/mrp.c +++ b/net/802/mrp.c @@ -871,10 +871,10 @@ void mrp_uninit_applicant(struct net_device *dev, struct mrp_application *appl) */ del_timer_sync(&app->join_timer); - spin_lock(&app->lock); + spin_lock_bh(&app->lock); mrp_mad_event(app, MRP_EVENT_TX); mrp_pdu_queue(app); - spin_unlock(&app->lock); + spin_unlock_bh(&app->lock); mrp_queue_xmit(app); |