diff options
| author | Roland Dreier <roland@purestorage.com> | 2012-07-16 20:04:42 +0200 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-07-17 02:35:27 +0200 |
| commit | 1c7b13fe65269960f63082eafccede547191ab02 (patch) | |
| tree | 2c2d7f46ab88c31f3b347394ef0d51eb9d11ab8c /drivers/target | |
| parent | qla2xxx: Remove racy, now-redundant check of sess_tearing_down (diff) | |
| download | linux-1c7b13fe65269960f63082eafccede547191ab02.tar.xz linux-1c7b13fe65269960f63082eafccede547191ab02.zip | |
target: Remove se_session.sess_wait_list
Since we set se_session.sess_tearing_down and stop new commands from
being added to se_session.sess_cmd_list before we wait for commands to
finish when freeing a session, there's no need for a separate
sess_wait_list -- if we let new commands be added to sess_cmd_list
after setting sess_tearing_down, that would be a bug that breaks the
logic of waiting in-flight commands.
Also rename target_splice_sess_cmd_list() to
target_sess_cmd_list_set_waiting(), since we are no longer splicing
onto a separate list.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_transport.c | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index a979514061e7..357bb24afba2 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -232,7 +232,6 @@ struct se_session *transport_init_session(void) INIT_LIST_HEAD(&se_sess->sess_list); INIT_LIST_HEAD(&se_sess->sess_acl_list); INIT_LIST_HEAD(&se_sess->sess_cmd_list); - INIT_LIST_HEAD(&se_sess->sess_wait_list); spin_lock_init(&se_sess->sess_cmd_lock); kref_init(&se_sess->sess_kref); @@ -2478,28 +2477,27 @@ int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd) } EXPORT_SYMBOL(target_put_sess_cmd); -/* target_splice_sess_cmd_list - Split active cmds into sess_wait_list - * @se_sess: session to split +/* target_sess_cmd_list_set_waiting - Flag all commands in + * sess_cmd_list to complete cmd_wait_comp. Set + * sess_tearing_down so no more commands are queued. + * @se_sess: session to flag */ -void target_splice_sess_cmd_list(struct se_session *se_sess) +void target_sess_cmd_list_set_waiting(struct se_session *se_sess) { struct se_cmd *se_cmd; unsigned long flags; - WARN_ON(!list_empty(&se_sess->sess_wait_list)); - INIT_LIST_HEAD(&se_sess->sess_wait_list); - spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); - se_sess->sess_tearing_down = 1; - list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list); + WARN_ON(se_sess->sess_tearing_down); + se_sess->sess_tearing_down = 1; - list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list) + list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) se_cmd->cmd_wait_set = 1; spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); } -EXPORT_SYMBOL(target_splice_sess_cmd_list); +EXPORT_SYMBOL(target_sess_cmd_list_set_waiting); /* target_wait_for_sess_cmds - Wait for outstanding descriptors * @se_sess: session to wait for active I/O @@ -2513,7 +2511,7 @@ void target_wait_for_sess_cmds( bool rc = false; list_for_each_entry_safe(se_cmd, tmp_cmd, - &se_sess->sess_wait_list, se_cmd_list) { + &se_sess->sess_cmd_list, se_cmd_list) { list_del(&se_cmd->se_cmd_list); pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:" |