From: Hannes Reinecke <hare@suse.de>
Date: Fri, 30 Sep 2016 09:01:18 +0000 (+0200)
Subject: scsi: libfc: Do not login if the port is already started
X-Git-Tag: v4.10-rc1~128^2~245
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=06ee2571a438653bd14c33c70379a5f008a91901;p=linux.git

scsi: libfc: Do not login if the port is already started

When the port is already started we don't need to login; that
will only confuse the state machine.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 4e4087a00836..72a7183fdd06 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -418,6 +418,12 @@ static int fc_rport_login(struct fc_rport_priv *rdata)
 {
 	mutex_lock(&rdata->rp_mutex);
 
+	if (rdata->flags & FC_RP_STARTED) {
+		FC_RPORT_DBG(rdata, "port already started\n");
+		mutex_unlock(&rdata->rp_mutex);
+		return 0;
+	}
+
 	rdata->flags |= FC_RP_STARTED;
 	switch (rdata->rp_state) {
 	case RPORT_ST_READY: