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scsi: lpfc: Fix driver not setting dpp bits correctly in doorbell word 

Driver is incorrectly formatting a register on new hardware, using a format
for an older chip. This can result in non-deterministic behavior.

Ensure driver is not setting "workqueue index" in the WQ doorbell when
making a non-dpp doorbell write. The field must be zero when non-dpp.

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>
This commit is contained in:
James Smart 2018-06-26 08:24:23 -07:00 committed by Martin K. Petersen
parent afff0d2321
commit 5cc167ddb7
1 changed files with 8 additions and 1 deletions
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9
drivers/scsi/lpfc/lpfc_sli.c
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@ -145,6 +145,7 @@ lpfc_sli4_wq_put(struct lpfc_queue *q, union lpfc_wqe128 *wqe)
uint32_t idx;
uint32_t i = 0;
uint8_t *tmp;
u32 if_type;
/* sanity check on queue memory */
if (unlikely(!q))
@ -199,8 +200,14 @@ lpfc_sli4_wq_put(struct lpfc_queue *q, union lpfc_wqe128 *wqe)
q->queue_id);
} else {
bf_set(lpfc_wq_db_list_fm_num_posted, &doorbell, 1);
bf_set(lpfc_wq_db_list_fm_index, &doorbell, host_index);
bf_set(lpfc_wq_db_list_fm_id, &doorbell, q->queue_id);
/* Leave bits <23:16> clear for if_type 6 dpp */
if_type = bf_get(lpfc_sli_intf_if_type,
&q->phba->sli4_hba.sli_intf);
if (if_type != LPFC_SLI_INTF_IF_TYPE_6)
bf_set(lpfc_wq_db_list_fm_index, &doorbell,
host_index);
}
} else if (q->db_format == LPFC_DB_RING_FORMAT) {
bf_set(lpfc_wq_db_ring_fm_num_posted, &doorbell, 1);