From: Satish Kharat <satishkh@cisco.com>
Date: Wed, 1 Mar 2017 00:11:57 +0000 (-0800)
Subject: scsi: fnic: Ratelimit printks to avoid flooding when vlan is not set by the switch.i
X-Git-Tag: v4.12-rc1~99^2~147
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b43abcbbd5b10d5f057c8388cc4eff9ff1fe2fd6;p=platform%2Fkernel%2Flinux-exynos.git

scsi: fnic: Ratelimit printks to avoid flooding when vlan is not set by the switch.i

This is to avoid the log from being filled with vlan discovery messages
when there is no vlan configured on the switch.

Signed-off-by: Satish Kharat <satishkh@cisco.com>
Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
index 3b7da66..8d2d86e 100644
--- a/drivers/scsi/fnic/fnic_fcs.c
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -342,8 +342,11 @@ static void fnic_fcoe_send_vlan_req(struct fnic *fnic)
 
 	fnic_fcoe_reset_vlans(fnic);
 	fnic->set_vlan(fnic, 0);
-	FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
-		  "Sending VLAN request...\n");
+
+	if (printk_ratelimit())
+		FNIC_FCS_DBG(KERN_INFO, fnic->lport->host,
+			  "Sending VLAN request...\n");
+
 	skb = dev_alloc_skb(sizeof(struct fip_vlan));
 	if (!skb)
 		return;
@@ -1313,10 +1316,11 @@ void fnic_handle_fip_timer(struct fnic *fnic)
 
 	spin_lock_irqsave(&fnic->vlans_lock, flags);
 	if (list_empty(&fnic->vlans)) {
-		/* no vlans available, try again */
-		FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
-			  "Start VLAN Discovery\n");
 		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
+		/* no vlans available, try again */
+		if (printk_ratelimit())
+			FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+				  "Start VLAN Discovery\n");
 		fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
 		return;
 	}
@@ -1332,10 +1336,11 @@ void fnic_handle_fip_timer(struct fnic *fnic)
 		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
 		break;
 	case FIP_VLAN_FAILED:
-		/* if all vlans are in failed state, restart vlan disc */
-		FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
-			  "Start VLAN Discovery\n");
 		spin_unlock_irqrestore(&fnic->vlans_lock, flags);
+		/* if all vlans are in failed state, restart vlan disc */
+		if (printk_ratelimit())
+			FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host,
+				  "Start VLAN Discovery\n");
 		fnic_event_enq(fnic, FNIC_EVT_START_VLAN_DISC);
 		break;
 	case FIP_VLAN_SENT: