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17 May 2024, 09:02:56 UTC
Revision 9b31a328e344e62e7cc98ae574edcb7b674719bb authored by Nicholas Bellinger on 15 May 2013, 07:52:44 UTC, committed by Nicholas Bellinger on 30 May 2013, 04:30:33 UTC 
target: Re-instate sess_wait_list for target_wait_for_sess_cmds
 
Switch back to pre commit 1c7b13fe652 list splicing logic for active I/O
shutdown with tcm_qla2xxx + ib_srpt fabrics.

The original commit was done under the incorrect assumption that it's safe to
walk se_sess->sess_cmd_list unprotected in target_wait_for_sess_cmds() after
sess->sess_tearing_down = 1 has been set by target_sess_cmd_list_set_waiting()
during session shutdown.

So instead of adding sess->sess_cmd_lock protection around sess->sess_cmd_list
during target_wait_for_sess_cmds(), switch back to sess->sess_wait_list to
allow wait_for_completion() + TFO->release_cmd() to occur without having to
walk ->sess_cmd_list after the list_splice.

Also add a check to exit if target_sess_cmd_list_set_waiting() has already
been called, and add a WARN_ON to check for any fabric bug where new se_cmds
are added to sess->sess_cmd_list after sess->sess_tearing_down = 1 has already
been set.

Cc: Joern Engel <joern@logfs.org>
Cc: Roland Dreier <roland@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
1 parent be646c2
History
Tip revision: 9b31a328e344e62e7cc98ae574edcb7b674719bb authored by Nicholas Bellinger on 15 May 2013, 07:52:44 UTC
target: Re-instate sess_wait_list for target_wait_for_sess_cmds
Tip revision: 9b31a32
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.gitignore -rw-r--r-- 1.1 KB
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MAINTAINERS -rw-r--r-- 248.1 KB
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REPORTING-BUGS -rw-r--r-- 7.3 KB

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