[SCSI] lpfc 8.3.38: Fixed circular locking dependency and inconsistent lock state issues

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/lpfc/lpfc_hbadisc.c

@@ -2990,6 +2990,7 @@ lpfc_mbx_process_link_up(struct lpfc_hba *phba, struct lpfc_mbx_read_top *la)
 	struct lpfc_dmabuf *mp;
 	int rc;
 	struct fcf_record *fcf_record;
+	uint32_t fc_flags = 0;
 
 	spin_lock_irq(&phba->hbalock);
 	switch (bf_get(lpfc_mbx_read_top_link_spd, la)) {
@@ -3021,11 +3022,8 @@ lpfc_mbx_process_link_up(struct lpfc_hba *phba, struct lpfc_mbx_read_top *la)
 				"1309 Link Up Event npiv not supported in loop "
 				"topology\n");
 				/* Get Loop Map information */
-		if (bf_get(lpfc_mbx_read_top_il, la)) {
-			spin_lock(shost->host_lock);
-			vport->fc_flag |= FC_LBIT;
-			spin_unlock(shost->host_lock);
-		}
+		if (bf_get(lpfc_mbx_read_top_il, la))
+			fc_flags |= FC_LBIT;
 
 		vport->fc_myDID = bf_get(lpfc_mbx_read_top_alpa_granted, la);
 		i = la->lilpBde64.tus.f.bdeSize;
@@ -3074,12 +3072,16 @@ lpfc_mbx_process_link_up(struct lpfc_hba *phba, struct lpfc_mbx_read_top *la)
 				phba->sli3_options |= LPFC_SLI3_NPIV_ENABLED;
 		}
 		vport->fc_myDID = phba->fc_pref_DID;
-		spin_lock(shost->host_lock);
-		vport->fc_flag |= FC_LBIT;
-		spin_unlock(shost->host_lock);
+		fc_flags |= FC_LBIT;
 	}
 	spin_unlock_irq(&phba->hbalock);
 
+	if (fc_flags) {
+		spin_lock_irq(shost->host_lock);
+		vport->fc_flag |= fc_flags;
+		spin_unlock_irq(shost->host_lock);
+	}
+
 	lpfc_linkup(phba);
 	sparam_mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 	if (!sparam_mbox)

drivers/scsi/lpfc/lpfc_init.c

@@ -2914,9 +2914,9 @@ lpfc_sli4_xri_sgl_update(struct lpfc_hba *phba)
 			sglq_entry->state = SGL_FREED;
 			list_add_tail(&sglq_entry->list, &els_sgl_list);
 		}
-		spin_lock(&phba->hbalock);
+		spin_lock_irq(&phba->hbalock);
 		list_splice_init(&els_sgl_list, &phba->sli4_hba.lpfc_sgl_list);
-		spin_unlock(&phba->hbalock);
+		spin_unlock_irq(&phba->hbalock);
 	} else if (els_xri_cnt < phba->sli4_hba.els_xri_cnt) {
 		/* els xri-sgl shrinked */
 		xri_cnt = phba->sli4_hba.els_xri_cnt - els_xri_cnt;
@@ -3014,9 +3014,9 @@ lpfc_sli4_xri_sgl_update(struct lpfc_hba *phba)
 		psb->cur_iocbq.sli4_lxritag = lxri;
 		psb->cur_iocbq.sli4_xritag = phba->sli4_hba.xri_ids[lxri];
 	}
-	spin_lock(&phba->scsi_buf_list_lock);
+	spin_lock_irq(&phba->scsi_buf_list_lock);
 	list_splice_init(&scsi_sgl_list, &phba->lpfc_scsi_buf_list);
-	spin_unlock(&phba->scsi_buf_list_lock);
+	spin_unlock_irq(&phba->scsi_buf_list_lock);
 
 	return 0;
 

drivers/scsi/lpfc/lpfc_scsi.c

@@ -885,9 +885,9 @@ lpfc_sli4_repost_scsi_sgl_list(struct lpfc_hba *phba)
 	int num_posted, rc = 0;
 
 	/* get all SCSI buffers need to repost to a local list */
-	spin_lock(&phba->scsi_buf_list_lock);
+	spin_lock_irq(&phba->scsi_buf_list_lock);
 	list_splice_init(&phba->lpfc_scsi_buf_list, &post_sblist);
-	spin_unlock(&phba->scsi_buf_list_lock);
+	spin_unlock_irq(&phba->scsi_buf_list_lock);
 
 	/* post the list of scsi buffer sgls to port if available */
 	if (!list_empty(&post_sblist)) {

drivers/scsi/lpfc/lpfc_sli.c

@@ -5999,9 +5999,9 @@ lpfc_sli4_repost_els_sgl_list(struct lpfc_hba *phba)
 	LIST_HEAD(post_sgl_list);
 	LIST_HEAD(free_sgl_list);
 
-	spin_lock(&phba->hbalock);
+	spin_lock_irq(&phba->hbalock);
 	list_splice_init(&phba->sli4_hba.lpfc_sgl_list, &allc_sgl_list);
-	spin_unlock(&phba->hbalock);
+	spin_unlock_irq(&phba->hbalock);
 
 	list_for_each_entry_safe(sglq_entry, sglq_entry_next,
 				 &allc_sgl_list, list) {
@@ -6102,10 +6102,10 @@ lpfc_sli4_repost_els_sgl_list(struct lpfc_hba *phba)
 
 	/* push els sgls posted to the availble list */
 	if (!list_empty(&post_sgl_list)) {
-		spin_lock(&phba->hbalock);
+		spin_lock_irq(&phba->hbalock);
 		list_splice_init(&post_sgl_list,
 				 &phba->sli4_hba.lpfc_sgl_list);
-		spin_unlock(&phba->hbalock);
+		spin_unlock_irq(&phba->hbalock);
 	} else {
 		lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
 				"3161 Failure to post els sgl to port.\n");