diff options
| author | James Smart <[email protected]> | 2019-08-14 16:56:52 -0700 |
|---|---|---|
| committer | Martin K. Petersen <[email protected]> | 2019-08-19 22:41:10 -0400 |
| commit | 894bb17f0cb07a6503d096dbbd156e38a3640822 (patch) | |
| tree | 39829040f70718ecfcff7381691172f6339e186f /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 6825b7bd32030486cc94bdd4bb512756fcd5b901 (diff) | |
scsi: lpfc: Fix deadlock on host_lock during cable pulls
During cable pull testing a deadlock was seen between lpfc_nlp_counters()
vs lpfc_mbox_process_link_up() vs lpfc_work_list_done(). They are all
waiting on the shost->host_lock.
Issue is all of these cases raise irq when taking out the lock but use
spin_unlock_irq() when unlocking. The unlock path is will unconditionally
re-enable interrupts in cases where irq state should be preserved. The
re-enablement allowed the other paths to execute which then causes the
deadlock.
Fix by converting the lock/unlock to irqsave/irqrestore.
Signed-off-by: Dick Kennedy <[email protected]>
Signed-off-by: James Smart <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions