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authorAndy Grover <andy.grover@oracle.com>2009-04-01 08:20:19 +0000
committerDavid S. Miller <davem@davemloft.net>2009-04-02 00:52:22 -0700
commit745cbccac3fe8cead529a1b3358e1e86a1505bfa (patch)
tree6c865b19881dbdd64556cc1827f6966d8a646a38 /net/rds/iw.c
parentf1cffcbfcc53b825da7d1d26244aabd8dccb24aa (diff)
downloadop-kernel-dev-745cbccac3fe8cead529a1b3358e1e86a1505bfa.zip
op-kernel-dev-745cbccac3fe8cead529a1b3358e1e86a1505bfa.tar.gz
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/iw.c')
-rw-r--r--net/rds/iw.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/net/rds/iw.c b/net/rds/iw.c
index 1b56905..b732efb 100644
--- a/net/rds/iw.c
+++ b/net/rds/iw.c
@@ -51,6 +51,7 @@ MODULE_PARM_DESC(fastreg_message_size, " Max size of a RDMA transfer (fastreg MR
struct list_head rds_iw_devices;
+/* NOTE: if also grabbing iwdev lock, grab this first */
DEFINE_SPINLOCK(iw_nodev_conns_lock);
LIST_HEAD(iw_nodev_conns);
@@ -145,7 +146,7 @@ void rds_iw_remove_one(struct ib_device *device)
}
spin_unlock_irq(&rds_iwdev->spinlock);
- rds_iw_remove_conns(rds_iwdev);
+ rds_iw_destroy_conns(rds_iwdev);
if (rds_iwdev->mr_pool)
rds_iw_destroy_mr_pool(rds_iwdev->mr_pool);
@@ -258,7 +259,7 @@ static int rds_iw_laddr_check(__be32 addr)
void rds_iw_exit(void)
{
rds_info_deregister_func(RDS_INFO_IWARP_CONNECTIONS, rds_iw_ic_info);
- rds_iw_remove_nodev_conns();
+ rds_iw_destroy_nodev_conns();
ib_unregister_client(&rds_iw_client);
rds_iw_sysctl_exit();
rds_iw_recv_exit();
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