FAILED: patch "[PATCH] mei: reset flow control on the last client disconnection" failed to apply to 4.1-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 4.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

>From c241e9b1d9ee7292d708d2298bc87f1455aad0c7 Mon Sep 17 00:00:00 2001
From: Alexander Usyskin <alexander.usyskin@intel.com>
Date: Sat, 13 Jun 2015 21:18:40 +0300
Subject: [PATCH] mei: reset flow control on the last client disconnection

The FW resets the flow control for single buffer clients when the last
host client disconnects, also the driver has to follow this policy and
zero the flow control counter in such case.

Cc: <stable@vger.kernel.org> #4.1
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 7a5a6636f0fd..d089b136f12c 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -755,6 +755,9 @@ void mei_cl_set_disconnected(struct mei_cl *cl)
 	if (!WARN_ON(cl->me_cl->connect_count == 0))
 		cl->me_cl->connect_count--;
 
+	if (cl->me_cl->connect_count == 0)
+		cl->me_cl->mei_flow_ctrl_creds = 0;
+
 	mei_me_cl_put(cl->me_cl);
 	cl->me_cl = NULL;
 }