Patch "[PATCH 057/135] lpfc: Fix external loopback failure." has been added to the 4.4-stable tree

Patch "[PATCH 057/135] lpfc: Fix external loopback failure." has been added to the 4.4-stable tree

[gregkh]

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

    [PATCH 057/135] lpfc: Fix external loopback failure.

to the 4.4-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:
     0057-lpfc-Fix-external-loopback-failure.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 1a7ae138e2131e9828f50eb577dc964efbef0d68 Mon Sep 17 00:00:00 2001
From: James Smart <james.smart@avagotech.com>
Date: Wed, 16 Dec 2015 18:12:04 -0500
Subject: [PATCH 057/135] lpfc: Fix external loopback failure.

[ Upstream commit 4360ca9c24388e44cb0e14861a62fff43cf225c0 ]

Fix external loopback failure.

Rx sequence reassembly was incorrect.

Signed-off-by: Dick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: James Smart <james.smart@avagotech.com>
Reviewed-by: Hannes Reinicke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/scsi/lpfc/lpfc_sli.c |   15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -14842,10 +14842,12 @@ lpfc_fc_frame_add(struct lpfc_vport *vpo
 	struct lpfc_dmabuf *h_buf;
 	struct hbq_dmabuf *seq_dmabuf = NULL;
 	struct hbq_dmabuf *temp_dmabuf = NULL;
+	uint8_t	found = 0;
 
 	INIT_LIST_HEAD(&dmabuf->dbuf.list);
 	dmabuf->time_stamp = jiffies;
 	new_hdr = (struct fc_frame_header *)dmabuf->hbuf.virt;
+
 	/* Use the hdr_buf to find the sequence that this frame belongs to */
 	list_for_each_entry(h_buf, &vport->rcv_buffer_list, list) {
 		temp_hdr = (struct fc_frame_header *)h_buf->virt;
@@ -14885,7 +14887,8 @@ lpfc_fc_frame_add(struct lpfc_vport *vpo
 		return seq_dmabuf;
 	}
 	/* find the correct place in the sequence to insert this frame */
-	list_for_each_entry_reverse(d_buf, &seq_dmabuf->dbuf.list, list) {
+	d_buf = list_entry(seq_dmabuf->dbuf.list.prev, typeof(*d_buf), list);
+	while (!found) {
 		temp_dmabuf = container_of(d_buf, struct hbq_dmabuf, dbuf);
 		temp_hdr = (struct fc_frame_header *)temp_dmabuf->hbuf.virt;
 		/*
@@ -14895,9 +14898,17 @@ lpfc_fc_frame_add(struct lpfc_vport *vpo
 		if (be16_to_cpu(new_hdr->fh_seq_cnt) >
 			be16_to_cpu(temp_hdr->fh_seq_cnt)) {
 			list_add(&dmabuf->dbuf.list, &temp_dmabuf->dbuf.list);
-			return seq_dmabuf;
+			found = 1;
+			break;
 		}
+
+		if (&d_buf->list == &seq_dmabuf->dbuf.list)
+			break;
+		d_buf = list_entry(d_buf->list.prev, typeof(*d_buf), list);
 	}
+
+	if (found)
+		return seq_dmabuf;
 	return NULL;
 }
 


Patches currently in stable-queue which might be from james.smart@avagotech.com are

queue-4.4/0056-lpfc-Fix-mbox-reuse-in-PLOGI-completion.patch
queue-4.4/0052-lpfc-Fix-driver-crash-when-module-parameter-lpfc_fcp.patch
queue-4.4/0121-lpfc-Fix-DMA-faults-observed-upon-plugging-loopback-.patch
queue-4.4/0049-lpfc-Fix-FCF-Infinite-loop-in-lpfc_sli4_fcf_rr_next_.patch
queue-4.4/0055-lpfc-Fix-RDP-ACC-being-too-long.patch
queue-4.4/0051-lpfc-Fix-RegLogin-failed-error-seen-on-Lancer-FC-dur.patch
queue-4.4/0054-lpfc-Fix-RDP-Speed-reporting.patch
queue-4.4/0057-lpfc-Fix-external-loopback-failure.patch
queue-4.4/0053-lpfc-Fix-crash-in-fcp-command-completion-path.patch
queue-4.4/0050-lpfc-Fix-the-FLOGI-discovery-logic-to-comply-with-T1.patch