diff options
| author | James Smart <jsmart2021@gmail.com> | 2018-09-10 10:30:46 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-09-11 20:37:33 -0400 |
| commit | 523128e53b1e82a7eb422168eddd0c566973520d (patch) | |
| tree | 919c6490bfb70ba9f8b91db59827c215a3691249 /drivers/scsi/lpfc/lpfc.h | |
| parent | 0ef01a2d95fd62bb4f536e7ce4d5e8e74b97a244 (diff) | |
| download | lwn-523128e53b1e82a7eb422168eddd0c566973520d.tar.gz lwn-523128e53b1e82a7eb422168eddd0c566973520d.zip | |
scsi: lpfc: Correct irq handling via locks when taking adapter offline
When taking the board offline while performing i/o, unsafe locking errors
occurred and irq level isn't properly managed.
In lpfc_sli_hba_down, spin_lock_irqsave(&phba->hbalock, flags) does not
disable softirqs raised from timer expiry. It is possible that a softirq is
raised from the lpfc_els_retry_delay routine and recursively requests the same
phba->hbalock spinlock causing deadlock.
Address the deadlocks by creating a new port_list lock. The softirq behavior
can then be managed a level deeper into the calling sequences.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc.h')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h index 6993debe4239..6340883ece33 100644 --- a/drivers/scsi/lpfc/lpfc.h +++ b/drivers/scsi/lpfc/lpfc.h @@ -964,6 +964,7 @@ struct lpfc_hba { uint32_t intr_mode; #define LPFC_INTR_ERROR 0xFFFFFFFF struct list_head port_list; + spinlock_t port_list_lock; /* lock for port_list mutations */ struct lpfc_vport *pport; /* physical lpfc_vport pointer */ uint16_t max_vpi; /* Maximum virtual nports */ #define LPFC_MAX_VPI 0xFFFF /* Max number of VPI supported */ |