scsi: lpfc: Remove shost_lock protection for fc_host_port shost APIs

Desiring to reduce the amount of unnecessary shost_lock acquisitions in the
lpfc driver, it has been determined that there is no need for shost_lock
protection when retrieving fc_host port information because it is only for
display to user via sysfs.

Signed-off-by: Justin Tee <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Himanshu Madhani <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

Author: Justin Tee

drivers/scsi/lpfc/lpfc_attr.c

@@ -6429,8 +6429,6 @@ lpfc_get_host_port_type(struct Scsi_Host *shost)
 	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 	struct lpfc_hba   *phba = vport->phba;
 
-	spin_lock_irq(shost->host_lock);
-
 	if (vport->port_type == LPFC_NPIV_PORT) {
 		fc_host_port_type(shost) = FC_PORTTYPE_NPIV;
 	} else if (lpfc_is_link_up(phba)) {
@@ -6447,8 +6445,6 @@ lpfc_get_host_port_type(struct Scsi_Host *shost)
 		}
 	} else
 		fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN;
-
-	spin_unlock_irq(shost->host_lock);
 }
 
 /**
@@ -6461,8 +6457,6 @@ lpfc_get_host_port_state(struct Scsi_Host *shost)
 	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 	struct lpfc_hba   *phba = vport->phba;
 
-	spin_lock_irq(shost->host_lock);
-
 	if (vport->fc_flag & FC_OFFLINE_MODE)
 		fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
 	else {
@@ -6490,8 +6484,6 @@ lpfc_get_host_port_state(struct Scsi_Host *shost)
 			break;
 		}
 	}
-
-	spin_unlock_irq(shost->host_lock);
 }
 
 /**
@@ -6504,8 +6496,6 @@ lpfc_get_host_speed(struct Scsi_Host *shost)
 	struct lpfc_vport *vport = (struct lpfc_vport *) shost->hostdata;
 	struct lpfc_hba   *phba = vport->phba;
 
-	spin_lock_irq(shost->host_lock);
-
 	if ((lpfc_is_link_up(phba)) && (!(phba->hba_flag & HBA_FCOE_MODE))) {
 		switch(phba->fc_linkspeed) {
 		case LPFC_LINK_SPEED_1GHZ:
@@ -6568,8 +6558,6 @@ lpfc_get_host_speed(struct Scsi_Host *shost)
 		}
 	} else
 		fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
-
-	spin_unlock_irq(shost->host_lock);
 }
 
 /**
@@ -6583,8 +6571,6 @@ lpfc_get_host_fabric_name (struct Scsi_Host *shost)
 	struct lpfc_hba   *phba = vport->phba;
 	u64 node_name;
 
-	spin_lock_irq(shost->host_lock);
-
 	if ((vport->port_state > LPFC_FLOGI) &&
 	    ((vport->fc_flag & FC_FABRIC) ||
 	     ((phba->fc_topology == LPFC_TOPOLOGY_LOOP) &&
@@ -6594,8 +6580,6 @@ lpfc_get_host_fabric_name (struct Scsi_Host *shost)
 		/* fabric is local port if there is no F/FL_Port */
 		node_name = 0;
 
-	spin_unlock_irq(shost->host_lock);
-
 	fc_host_fabric_name(shost) = node_name;
 }