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| author | Andy Grover <andy.grover@oracle.com> | 2010-03-29 16:50:54 -0700 |
|---|---|---|
| committer | Andy Grover <andy.grover@oracle.com> | 2010-09-08 18:07:32 -0700 |
| commit | 9de0864cf55927a7383b5ba6e48834ff3ef053de (patch) | |
| tree | 875dcd8ecf01f539ac050763b449573d4210dadf /net/rds | |
| parent | 7c82eaf00ec7d460932be9314b29997006b799b6 (diff) | |
| download | linux-9de0864cf55927a7383b5ba6e48834ff3ef053de.tar.gz linux-9de0864cf55927a7383b5ba6e48834ff3ef053de.tar.xz | |
RDS: Fix locking in send on m_rs_lock
Do not nest m_rs_lock under c_lock
Disable interrupts in {rdma,atomic}_send_complete
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Diffstat (limited to 'net/rds')
| -rw-r--r-- | net/rds/send.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/net/rds/send.c b/net/rds/send.c index aee58f931b69..725fb0419797 100644 --- a/net/rds/send.c +++ b/net/rds/send.c @@ -415,8 +415,9 @@ void rds_rdma_send_complete(struct rds_message *rm, int status) struct rds_sock *rs = NULL; struct rds_rdma_op *ro; struct rds_notifier *notifier; + unsigned long flags; - spin_lock(&rm->m_rs_lock); + spin_lock_irqsave(&rm->m_rs_lock, flags); ro = rm->m_rdma_op; if (test_bit(RDS_MSG_ON_SOCK, &rm->m_flags) && @@ -433,7 +434,7 @@ void rds_rdma_send_complete(struct rds_message *rm, int status) ro->r_notifier = NULL; } - spin_unlock(&rm->m_rs_lock); + spin_unlock_irqrestore(&rm->m_rs_lock, flags); if (rs) { rds_wake_sk_sleep(rs); @@ -647,8 +648,8 @@ void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in *dest) list_for_each_entry(rm, &list, m_sock_item) { conn = rm->m_inc.i_conn; - spin_lock_irqsave(&conn->c_lock, flags); + spin_lock_irqsave(&conn->c_lock, flags); /* * Maybe someone else beat us to removing rm from the conn. * If we race with their flag update we'll get the lock and @@ -658,23 +659,23 @@ void rds_send_drop_to(struct rds_sock *rs, struct sockaddr_in *dest) spin_unlock_irqrestore(&conn->c_lock, flags); continue; } + list_del_init(&rm->m_conn_item); + spin_unlock_irqrestore(&conn->c_lock, flags); /* * Couldn't grab m_rs_lock in top loop (lock ordering), * but we can now. */ - spin_lock(&rm->m_rs_lock); + spin_lock_irqsave(&rm->m_rs_lock, flags); spin_lock(&rs->rs_lock); __rds_rdma_send_complete(rs, rm, RDS_RDMA_CANCELED); spin_unlock(&rs->rs_lock); rm->m_rs = NULL; - spin_unlock(&rm->m_rs_lock); + spin_unlock_irqrestore(&rm->m_rs_lock, flags); - list_del_init(&rm->m_conn_item); rds_message_put(rm); - spin_unlock_irqrestore(&conn->c_lock, flags); } rds_wake_sk_sleep(rs); |