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, 5 insertions, 5 deletions

diff --git a/kernel/drivers/net/ethernet/broadcom/tg3.c b/kernel/drivers/net/ethernet/broadcom/tg3.c
index ca5ac5d6f..49056c33b 100644
--- a/kernel/drivers/net/ethernet/broadcom/tg3.c
+++ b/kernel/drivers/net/ethernet/broadcom/tg3.c
@@ -18142,14 +18142,14 @@ static pci_ers_result_t tg3_io_error_detected(struct pci_dev *pdev,
 
 	rtnl_lock();
 
-	/* We needn't recover from permanent error */
-	if (state == pci_channel_io_frozen)
-		tp->pcierr_recovery = true;
-
 	/* We probably don't have netdev yet */
 	if (!netdev || !netif_running(netdev))
 		goto done;
 
+	/* We needn't recover from permanent error */
+	if (state == pci_channel_io_frozen)
+		tp->pcierr_recovery = true;
+
 	tg3_phy_stop(tp);
 
 	tg3_netif_stop(tp);
@@ -18246,7 +18246,7 @@ static void tg3_io_resume(struct pci_dev *pdev)
 
 	rtnl_lock();
 
-	if (!netif_running(netdev))
+	if (!netdev || !netif_running(netdev))
 		goto done;
 
 	tg3_full_lock(tp, 0);