Patch "scsi: lpfc: Fix issues connecting with nvme initiator" has been added to the 4.15-stable tree

This is a note to let you know that I've just added the patch titled

scsi: lpfc: Fix issues connecting with nvme initiator

to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
scsi-lpfc-fix-issues-connecting-with-nvme-initiator.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: James Smart <[email protected]>
Date: Fri, 8 Dec 2017 17:18:08 -0800
Subject: scsi: lpfc: Fix issues connecting with nvme initiator

From: James Smart <[email protected]>

[ Upstream commit e06351a002214d152142906a546006e3446d1ef7 ]

In the lpfc discovery engine, when as a nvme target, where the driver was performing mailbox io with the adapter for port login when a NVME PRLI is received from the host. Rather than queue and eventually get back to sending a response after the mailbox traffic, the driver rejected the io with an error response.

Turns out this particular initiator didn't like the rejection values (unable to process command/command in progress) so it never attempted a retry of the PRLI. Thus the host never established nvme connectivity with the lpfc target.

By changing the rejection values (to Logical Busy/nothing more), the initiator accepted the response and would retry the PRLI, resulting in nvme connectivity.

---
 drivers/scsi/lpfc/lpfc_nportdisc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -1569,8 +1569,8 @@ lpfc_rcv_prli_reglogin_issue(struct lpfc
 					 ndlp->nlp_rpi, ndlp->nlp_state,
 					 ndlp->nlp_flag);
 			memset(&stat, 0, sizeof(struct ls_rjt));
-			stat.un.b.lsRjtRsnCode = LSRJT_UNABLE_TPC;
-			stat.un.b.lsRjtRsnCodeExp = LSEXP_CMD_IN_PROGRESS;
+			stat.un.b.lsRjtRsnCode = LSRJT_LOGICAL_BSY;
+			stat.un.b.lsRjtRsnCodeExp = LSEXP_NOTHING_MORE;
 			lpfc_els_rsp_reject(vport, stat.un.lsRjtError, cmdiocb,
 					    ndlp, NULL);
 			return ndlp->nlp_state;

Patches currently in stable-queue which might be from [email protected] are

queue-4.15/scsi-lpfc-fix-scsi-lun-discovery-when-scsi-and-nvme-enabled.patch queue-4.15/scsi-lpfc-fix-issues-connecting-with-nvme-initiator.patch