Upgrade to 4.4.50-rt62

The current kernel is based on rt kernel v4.4.6-rt14. We will upgrade it
to 4.4.50-rt62.
The command to achieve it is:
a) Clone a git repo from
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git

b) Get the diff between this two changesets:
git diff 640eca2901f3435e616157b11379d3223a44b391
705619beeea1b0b48219a683fd1a901a86fdaf5e

where the two commits are:
[yjiang5@jnakajim-build linux-stable-rt]$ git show --oneline --name-only
640eca2901f3435e616157b11379d3223a44b391
640eca2901f3 v4.4.6-rt14
localversion-rt
[yjiang5@jnakajim-build linux-stable-rt]$ git show --oneline --name-only
705619beeea1b0b48219a683fd1a901a86fdaf5e
705619beeea1 Linux 4.4.50-rt62
localversion-rt

c) One patch has been backported thus revert the patch before applying.

 filterdiff -p1 -x scripts/package/Makefile
~/tmp/v4.4.6-rt14-4.4.50-rt62.diff  |patch -p1 --dry-run

Upstream status: backport

Change-Id: I244d57a32f6066e5a5b9915f9fbf99e7bbca6e01
Signed-off-by: Yunhong Jiang <yunhong.jiang@linux.intel.com>

1 files changed, 19 insertions, 4 deletions

diff --git a/kernel/drivers/scsi/lpfc/lpfc_sli.c b/kernel/drivers/scsi/lpfc/lpfc_sli.c
index f9585cdd8..92dfd6a51 100644
--- a/kernel/drivers/scsi/lpfc/lpfc_sli.c
+++ b/kernel/drivers/scsi/lpfc/lpfc_sli.c
@@ -14842,10 +14842,12 @@ lpfc_fc_frame_add(struct lpfc_vport *vport, struct hbq_dmabuf *dmabuf)
 	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 *vport, struct hbq_dmabuf *dmabuf)
 		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 *vport, struct hbq_dmabuf *dmabuf)
 		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;
 }
 
@@ -16173,7 +16184,7 @@ fail_fcf_read:
 }
 
 /**
- * lpfc_check_next_fcf_pri
+ * lpfc_check_next_fcf_pri_level
  * phba pointer to the lpfc_hba struct for this port.
  * This routine is called from the lpfc_sli4_fcf_rr_next_index_get
  * routine when the rr_bmask is empty. The FCF indecies are put into the
@@ -16329,8 +16340,12 @@ next_priority:
 
 	if (next_fcf_index < LPFC_SLI4_FCF_TBL_INDX_MAX &&
 		phba->fcf.fcf_pri[next_fcf_index].fcf_rec.flag &
-		LPFC_FCF_FLOGI_FAILED)
+		LPFC_FCF_FLOGI_FAILED) {
+		if (list_is_singular(&phba->fcf.fcf_pri_list))
+			return LPFC_FCOE_FCF_NEXT_NONE;
+
 		goto next_priority;
+	}
 
 	lpfc_printf_log(phba, KERN_INFO, LOG_FIP,
 			"2845 Get next roundrobin failover FCF (x%x)\n",