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, 4 insertions, 4 deletions

diff --git a/kernel/drivers/scsi/fnic/fnic_fcs.c b/kernel/drivers/scsi/fnic/fnic_fcs.c
index 67669a9e7..f3a33312a 100644
--- a/kernel/drivers/scsi/fnic/fnic_fcs.c
+++ b/kernel/drivers/scsi/fnic/fnic_fcs.c
@@ -954,8 +954,8 @@ int fnic_alloc_rq_frame(struct vnic_rq *rq)
 	skb_put(skb, len);
 	pa = pci_map_single(fnic->pdev, skb->data, len, PCI_DMA_FROMDEVICE);
 
-	r = pci_dma_mapping_error(fnic->pdev, pa);
-	if (r) {
+	if (pci_dma_mapping_error(fnic->pdev, pa)) {
+		r = -ENOMEM;
 		printk(KERN_ERR "PCI mapping failed with error %d\n", r);
 		goto free_skb;
 	}
@@ -1093,8 +1093,8 @@ static int fnic_send_frame(struct fnic *fnic, struct fc_frame *fp)
 
 	pa = pci_map_single(fnic->pdev, eth_hdr, tot_len, PCI_DMA_TODEVICE);
 
-	ret = pci_dma_mapping_error(fnic->pdev, pa);
-	if (ret) {
+	if (pci_dma_mapping_error(fnic->pdev, pa)) {
+		ret = -ENOMEM;
 		printk(KERN_ERR "DMA map failed with error %d\n", ret);
 		goto free_skb_on_err;
 	}