diff options
| author | James Smart <jsmart2021@gmail.com> | 2018-01-30 15:58:54 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-02-12 11:43:23 -0500 |
| commit | 161df4f09987ae2e9f0f97f0b38eee298b4a39ff (patch) | |
| tree | 71414577d49a2cd1e9538abe4e2fef56f86165e5 /drivers | |
| parent | 64bf009933bc84a7fb44ff50f86af0201b8be0c3 (diff) | |
| download | linux-161df4f09987ae2e9f0f97f0b38eee298b4a39ff.tar.gz | |
scsi: lpfc: Fix soft lockup in lpfc worker thread during LIP testing
During link bounce testing in a point-to-point topology, the host may
enter a soft lockup on the lpfc_worker thread:
Call Trace:
lpfc_work_done+0x1f3/0x1390 [lpfc]
lpfc_do_work+0x16f/0x180 [lpfc]
kthread+0xc7/0xe0
ret_from_fork+0x3f/0x70
The driver was simultaneously setting a combination of flags that caused
lpfc_do_work()to effectively spin between slow path work and new event
data, causing the lockup.
Ensure in the typical wq completions, that new event data flags are set
if the slow path flag is running. The slow path will eventually
reschedule the wq handling.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_hbadisc.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c index b159a5c4e388..9265906d956e 100644 --- a/drivers/scsi/lpfc/lpfc_hbadisc.c +++ b/drivers/scsi/lpfc/lpfc_hbadisc.c @@ -696,8 +696,9 @@ lpfc_work_done(struct lpfc_hba *phba) phba->hba_flag & HBA_SP_QUEUE_EVT)) { if (pring->flag & LPFC_STOP_IOCB_EVENT) { pring->flag |= LPFC_DEFERRED_RING_EVENT; - /* Set the lpfc data pending flag */ - set_bit(LPFC_DATA_READY, &phba->data_flags); + /* Preserve legacy behavior. */ + if (!(phba->hba_flag & HBA_SP_QUEUE_EVT)) + set_bit(LPFC_DATA_READY, &phba->data_flags); } else { if (phba->link_state >= LPFC_LINK_UP || phba->link_flag & LS_MDS_LOOPBACK) { |