Patch "mei: return error on notification request to a disconnected client" has been added to the 4.4-stable tree

Patch "mei: return error on notification request to a disconnected client" 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

    mei: return error on notification request to a disconnected client

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:
     mei-return-error-on-notification-request-to-a-disconnected-client.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 foo@baz Mon Nov  6 10:22:56 CET 2017
From: Alexander Usyskin <alexander.usyskin@intel.com>
Date: Sat, 7 Oct 2017 22:37:48 +0000
Subject: mei: return error on notification request to a disconnected client

From: Alexander Usyskin <alexander.usyskin@intel.com>


[ Upstream commit 7c47d2ca0feca767479329da23523ed798acb854 ]

Request for a notification from a disconnected client will be ignored
silently by the FW but the caller should know that the operation hasn't
succeeded.

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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/misc/mei/client.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -1300,6 +1300,9 @@ int mei_cl_notify_request(struct mei_cl
 		return -EOPNOTSUPP;
 	}
 
+	if (!mei_cl_is_connected(cl))
+		return -ENODEV;
+
 	rets = pm_runtime_get(dev->dev);
 	if (rets < 0 && rets != -EINPROGRESS) {
 		pm_runtime_put_noidle(dev->dev);


Patches currently in stable-queue which might be from alexander.usyskin@intel.com are

queue-4.4/mei-return-error-on-notification-request-to-a-disconnected-client.patch