diff options
| author | Andy Grover <andy.grover@oracle.com> | 2009-04-01 08:20:19 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-04-02 00:52:22 -0700 |
| commit | 745cbccac3fe8cead529a1b3358e1e86a1505bfa (patch) | |
| tree | 6c865b19881dbdd64556cc1827f6966d8a646a38 /net/rds/ib.c | |
| parent | f1cffcbfcc53b825da7d1d26244aabd8dccb24aa (diff) | |
| download | linux-745cbccac3fe8cead529a1b3358e1e86a1505bfa.tar.bz2 | |
RDS: Rewrite connection cleanup, fixing oops on rmmod
This fixes a bug where a connection was unexpectedly
not on *any* list while being destroyed. It also
cleans up some code duplication and regularizes some
function names.
* Grab appropriate lock in conn_free() and explain in comment
* Ensure via locking that a conn is never not on either
a dev's list or the nodev list
* Add rds_xx_remove_conn() to match rds_xx_add_conn()
* Make rds_xx_add_conn() return void
* Rename remove_{,nodev_}conns() to
destroy_{,nodev_}conns() and unify their implementation
in a helper function
* Document lock ordering as nodev conn_lock before
dev_conn_lock
Reported-by: Yosef Etigin <yosefe@voltaire.com>
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/ib.c')
| -rw-r--r-- | net/rds/ib.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/rds/ib.c b/net/rds/ib.c index 06a7b798d9a7..4933b380985e 100644 --- a/net/rds/ib.c +++ b/net/rds/ib.c @@ -51,6 +51,7 @@ MODULE_PARM_DESC(fmr_message_size, " Max size of a RDMA transfer"); struct list_head rds_ib_devices; +/* NOTE: if also grabbing ibdev lock, grab this first */ DEFINE_SPINLOCK(ib_nodev_conns_lock); LIST_HEAD(ib_nodev_conns); @@ -137,7 +138,7 @@ void rds_ib_remove_one(struct ib_device *device) kfree(i_ipaddr); } - rds_ib_remove_conns(rds_ibdev); + rds_ib_destroy_conns(rds_ibdev); if (rds_ibdev->mr_pool) rds_ib_destroy_mr_pool(rds_ibdev->mr_pool); @@ -249,7 +250,7 @@ static int rds_ib_laddr_check(__be32 addr) void rds_ib_exit(void) { rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info); - rds_ib_remove_nodev_conns(); + rds_ib_destroy_nodev_conns(); ib_unregister_client(&rds_ib_client); rds_ib_sysctl_exit(); rds_ib_recv_exit(); |