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| author | Alex Leung <alex.leung@emulex.com> | 2014-04-04 04:38:19 +0000 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2014-04-11 15:27:15 -0700 |
| commit | 47b1584c1c95f0bb4d646c47de1c0455bb5cef54 (patch) | |
| tree | 62c12ddafcdba8431c125dd89ea5c49cdf9dffaa /drivers/target | |
| parent | bc0058695a74c0e9aef8bf9582a096ce4924f690 (diff) | |
| download | linux-47b1584c1c95f0bb4d646c47de1c0455bb5cef54.tar.gz linux-47b1584c1c95f0bb4d646c47de1c0455bb5cef54.tar.bz2 linux-47b1584c1c95f0bb4d646c47de1c0455bb5cef54.zip | |
target: Add check to prevent Abort Task from aborting itself
This patch addresses an issue that occurs when an ABTS is received
for an se_cmd that completes just before the sess_cmd_list is searched
in core_tmr_abort_task(). When the sess_cmd_list is searched, since
the ABTS and the FCP_CMND being aborted (that just completed) both
have the same OXID, TFO->get_task_tag(TMR) returns a value that
matches tmr->ref_task_tag (from TFO->get_task_tag(FCP_CMND)), and
the Abort Task tries to abort itself. When this occurs,
transport_wait_for_tasks() hangs forever since the TMR is waiting
for itself to finish.
This patch adds a check to core_tmr_abort_task() to make sure the
TMR does not attempt to abort itself.
Signed-off-by: Alex Leung <alex.leung@emulex.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_tmr.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c index 3f0338fff240..f7cd95e8111a 100644 --- a/drivers/target/target_core_tmr.c +++ b/drivers/target/target_core_tmr.c @@ -130,6 +130,11 @@ void core_tmr_abort_task( if (dev != se_cmd->se_dev) continue; + + /* skip se_cmd associated with tmr */ + if (tmr->task_cmd == se_cmd) + continue; + ref_tag = se_cmd->se_tfo->get_task_tag(se_cmd); if (tmr->ref_task_tag != ref_tag) continue; |