forked from Minki/linux
scsi: lpfc: Fix RQ empty firmware trap
When nvme target deferred receive logic waits for exchange resources, the corresponding receive buffer is not replenished with the hardware. This can result in a lack of asynchronous receive buffer resources in the hardware, resulting in a "2885 Port Status Event: ... error 1=0x52004a01 ..." message. Correct by replenishing the buffer whenenver the deferred logic kicks in. Update corresponding debug messages and statistics as well. [mkp: applied by hand] 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>
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91455b8509
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411de511c6
@ -259,6 +259,12 @@ lpfc_nvme_info_show(struct device *dev, struct device_attribute *attr,
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atomic_read(&tgtp->xmt_abort_rsp),
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atomic_read(&tgtp->xmt_abort_rsp_error));
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len += snprintf(buf + len, PAGE_SIZE - len,
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"DELAY: ctx %08x fod %08x wqfull %08x\n",
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atomic_read(&tgtp->defer_ctx),
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atomic_read(&tgtp->defer_fod),
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atomic_read(&tgtp->defer_wqfull));
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/* Calculate outstanding IOs */
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tot = atomic_read(&tgtp->rcv_fcp_cmd_drop);
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tot += atomic_read(&tgtp->xmt_fcp_release);
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@ -753,12 +753,16 @@ lpfc_rq_buf_free(struct lpfc_hba *phba, struct lpfc_dmabuf *mp)
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drqe.address_hi = putPaddrHigh(rqb_entry->dbuf.phys);
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rc = lpfc_sli4_rq_put(rqb_entry->hrq, rqb_entry->drq, &hrqe, &drqe);
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if (rc < 0) {
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(rqbp->rqb_free_buffer)(phba, rqb_entry);
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lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
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"6409 Cannot post to RQ %d: %x %x\n",
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"6409 Cannot post to HRQ %d: %x %x %x "
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"DRQ %x %x\n",
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rqb_entry->hrq->queue_id,
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rqb_entry->hrq->host_index,
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rqb_entry->hrq->hba_index);
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(rqbp->rqb_free_buffer)(phba, rqb_entry);
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rqb_entry->hrq->hba_index,
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rqb_entry->hrq->entry_count,
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rqb_entry->drq->host_index,
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rqb_entry->drq->hba_index);
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} else {
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list_add_tail(&rqb_entry->hbuf.list, &rqbp->rqb_buffer_list);
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rqbp->buffer_count++;
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@ -270,8 +270,6 @@ lpfc_nvmet_ctxbuf_post(struct lpfc_hba *phba, struct lpfc_nvmet_ctxbuf *ctx_buf)
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"NVMET RCV BUSY: xri x%x sz %d "
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"from %06x\n",
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oxid, size, sid);
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/* defer repost rcv buffer till .defer_rcv callback */
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ctxp->flag &= ~LPFC_NVMET_DEFER_RCV_REPOST;
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atomic_inc(&tgtp->rcv_fcp_cmd_out);
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return;
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}
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@ -837,6 +835,7 @@ lpfc_nvmet_xmt_fcp_op(struct nvmet_fc_target_port *tgtport,
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list_add_tail(&nvmewqeq->list, &wq->wqfull_list);
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wq->q_flag |= HBA_NVMET_WQFULL;
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spin_unlock_irqrestore(&pring->ring_lock, iflags);
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atomic_inc(&lpfc_nvmep->defer_wqfull);
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return 0;
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}
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@ -975,11 +974,9 @@ lpfc_nvmet_defer_rcv(struct nvmet_fc_target_port *tgtport,
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tgtp = phba->targetport->private;
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atomic_inc(&tgtp->rcv_fcp_cmd_defer);
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if (ctxp->flag & LPFC_NVMET_DEFER_RCV_REPOST)
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lpfc_rq_buf_free(phba, &nvmebuf->hbuf); /* repost */
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else
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/* Free the nvmebuf since a new buffer already replaced it */
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nvmebuf->hrq->rqbp->rqb_free_buffer(phba, nvmebuf);
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ctxp->flag &= ~LPFC_NVMET_DEFER_RCV_REPOST;
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}
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static struct nvmet_fc_target_template lpfc_tgttemplate = {
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@ -1309,6 +1306,9 @@ lpfc_nvmet_create_targetport(struct lpfc_hba *phba)
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atomic_set(&tgtp->xmt_abort_sol, 0);
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atomic_set(&tgtp->xmt_abort_rsp, 0);
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atomic_set(&tgtp->xmt_abort_rsp_error, 0);
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atomic_set(&tgtp->defer_ctx, 0);
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atomic_set(&tgtp->defer_fod, 0);
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atomic_set(&tgtp->defer_wqfull, 0);
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}
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return error;
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}
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@ -1810,6 +1810,8 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
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lpfc_nvmeio_data(phba, "NVMET FCP RCV: xri x%x sz %d CPU %02x\n",
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oxid, size, smp_processor_id());
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tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
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if (!ctx_buf) {
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/* Queue this NVME IO to process later */
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spin_lock_irqsave(&phba->sli4_hba.nvmet_io_wait_lock, iflag);
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@ -1825,10 +1827,11 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
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lpfc_post_rq_buffer(
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phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
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phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
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atomic_inc(&tgtp->defer_ctx);
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return;
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}
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tgtp = (struct lpfc_nvmet_tgtport *)phba->targetport->private;
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payload = (uint32_t *)(nvmebuf->dbuf.virt);
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sid = sli4_sid_from_fc_hdr(fc_hdr);
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@ -1892,12 +1895,20 @@ lpfc_nvmet_unsol_fcp_buffer(struct lpfc_hba *phba,
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/* Processing of FCP command is deferred */
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if (rc == -EOVERFLOW) {
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/*
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* Post a brand new DMA buffer to RQ and defer
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* freeing rcv buffer till .defer_rcv callback
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*/
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qno = nvmebuf->idx;
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lpfc_post_rq_buffer(
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phba, phba->sli4_hba.nvmet_mrq_hdr[qno],
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phba->sli4_hba.nvmet_mrq_data[qno], 1, qno);
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lpfc_nvmeio_data(phba,
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"NVMET RCV BUSY: xri x%x sz %d from %06x\n",
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oxid, size, sid);
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/* defer reposting rcv buffer till .defer_rcv callback */
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ctxp->flag |= LPFC_NVMET_DEFER_RCV_REPOST;
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atomic_inc(&tgtp->rcv_fcp_cmd_out);
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atomic_inc(&tgtp->defer_fod);
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return;
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}
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ctxp->rqb_buffer = nvmebuf;
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@ -72,7 +72,6 @@ struct lpfc_nvmet_tgtport {
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atomic_t xmt_fcp_rsp_aborted;
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atomic_t xmt_fcp_rsp_drop;
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/* Stats counters - lpfc_nvmet_xmt_fcp_abort */
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atomic_t xmt_fcp_xri_abort_cqe;
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atomic_t xmt_fcp_abort;
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@ -81,6 +80,11 @@ struct lpfc_nvmet_tgtport {
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atomic_t xmt_abort_unsol;
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atomic_t xmt_abort_rsp;
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atomic_t xmt_abort_rsp_error;
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/* Stats counters - defer IO */
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atomic_t defer_ctx;
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atomic_t defer_fod;
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atomic_t defer_wqfull;
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};
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struct lpfc_nvmet_ctx_info {
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@ -131,7 +135,6 @@ struct lpfc_nvmet_rcv_ctx {
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#define LPFC_NVMET_XBUSY 0x4 /* XB bit set on IO cmpl */
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#define LPFC_NVMET_CTX_RLS 0x8 /* ctx free requested */
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#define LPFC_NVMET_ABTS_RCV 0x10 /* ABTS received on exchange */
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#define LPFC_NVMET_DEFER_RCV_REPOST 0x20 /* repost to RQ on defer rcv */
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#define LPFC_NVMET_DEFER_WQFULL 0x40 /* Waiting on a free WQE */
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struct rqb_dmabuf *rqb_buffer;
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struct lpfc_nvmet_ctxbuf *ctxbuf;
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@ -6535,9 +6535,11 @@ lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hrq,
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struct lpfc_rqe hrqe;
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struct lpfc_rqe drqe;
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struct lpfc_rqb *rqbp;
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unsigned long flags;
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struct rqb_dmabuf *rqb_buffer;
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LIST_HEAD(rqb_buf_list);
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spin_lock_irqsave(&phba->hbalock, flags);
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rqbp = hrq->rqbp;
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for (i = 0; i < count; i++) {
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/* IF RQ is already full, don't bother */
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@ -6561,6 +6563,15 @@ lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hrq,
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drqe.address_hi = putPaddrHigh(rqb_buffer->dbuf.phys);
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rc = lpfc_sli4_rq_put(hrq, drq, &hrqe, &drqe);
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if (rc < 0) {
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lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
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"6421 Cannot post to HRQ %d: %x %x %x "
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"DRQ %x %x\n",
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hrq->queue_id,
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hrq->host_index,
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hrq->hba_index,
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hrq->entry_count,
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drq->host_index,
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drq->hba_index);
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rqbp->rqb_free_buffer(phba, rqb_buffer);
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} else {
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list_add_tail(&rqb_buffer->hbuf.list,
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@ -6568,6 +6579,7 @@ lpfc_post_rq_buffer(struct lpfc_hba *phba, struct lpfc_queue *hrq,
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rqbp->buffer_count++;
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}
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}
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spin_unlock_irqrestore(&phba->hbalock, flags);
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return 1;
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}
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