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| author | Tina Yang <Tina.Yang@oracle.com> | 2010-03-11 13:50:00 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-03-16 21:16:55 -0700 |
| commit | 048c15e641289d902f7ef9f1241068d8045e210c (patch) | |
| tree | f4e7f27a411b9310c98c41e82285e211abcbfbd7 | |
| parent | 2e7b3b994529d4760231a45a6b88950187bda877 (diff) | |
| download | linux-3.10-048c15e641289d902f7ef9f1241068d8045e210c.tar.gz linux-3.10-048c15e641289d902f7ef9f1241068d8045e210c.tar.bz2 linux-3.10-048c15e641289d902f7ef9f1241068d8045e210c.zip | |
RDS: Fix send locking issue
Fix a deadlock between rds_rdma_send_complete() and
rds_send_remove_from_sock() when rds socket lock and
rds message lock are acquired out-of-order.
Signed-off-by: Tina Yang <Tina.Yang@oracle.com>
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/rds/send.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/net/rds/send.c b/net/rds/send.c index ad2e46947c8..1a2ef24fbc9 100644 --- a/net/rds/send.c +++ b/net/rds/send.c @@ -533,14 +533,13 @@ void rds_send_remove_from_sock(struct list_head *messages, int status) if (rs != rm->m_rs) { if (rs) { - spin_unlock(&rs->rs_lock); rds_wake_sk_sleep(rs); sock_put(rds_rs_to_sk(rs)); } rs = rm->m_rs; - spin_lock(&rs->rs_lock); sock_hold(rds_rs_to_sk(rs)); } + spin_lock(&rs->rs_lock); if (test_and_clear_bit(RDS_MSG_ON_SOCK, &rm->m_flags)) { struct rds_rdma_op *ro = rm->m_rdma_op; @@ -560,6 +559,7 @@ void rds_send_remove_from_sock(struct list_head *messages, int status) rds_message_put(rm); rm->m_rs = NULL; } + spin_unlock(&rs->rs_lock); unlock_and_drop: spin_unlock(&rm->m_rs_lock); @@ -567,7 +567,6 @@ unlock_and_drop: } if (rs) { - spin_unlock(&rs->rs_lock); rds_wake_sk_sleep(rs); sock_put(rds_rs_to_sk(rs)); } |