Patch "md-cluster: make md-cluster also can work when compiled into kernel" has been added to the 4.4-stable tree

Patch "md-cluster: make md-cluster also can work when compiled into kernel" 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

    md-cluster: make md-cluster also can work when compiled into kernel

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:
     md-cluster-make-md-cluster-also-can-work-when-compiled-into-kernel.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 47a7b0d8888c04c9746812820b6e60553cc77bbc Mon Sep 17 00:00:00 2001
From: Guoqing Jiang <gqjiang@suse.com>
Date: Sun, 4 Sep 2016 22:17:28 -0400
Subject: md-cluster: make md-cluster also can work when compiled into kernel

From: Guoqing Jiang <gqjiang@suse.com>

commit 47a7b0d8888c04c9746812820b6e60553cc77bbc upstream.

The md-cluster is compiled as module by default,
if it is compiled by built-in way, then we can't
make md-cluster works.

[64782.630008] md/raid1:md127: active with 2 out of 2 mirrors
[64782.630528] md-cluster module not found.
[64782.630530] md127: Could not setup cluster service (-2)

Fixes: edb39c9 ("Introduce md_cluster_operations to handle cluster functions")
Reported-by: Marc Smith <marc.smith@mcc.edu>
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/md.c |   12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7572,16 +7572,12 @@ EXPORT_SYMBOL(unregister_md_cluster_oper
 
 int md_setup_cluster(struct mddev *mddev, int nodes)
 {
-	int err;
-
-	err = request_module("md-cluster");
-	if (err) {
-		pr_err("md-cluster module not found.\n");
-		return -ENOENT;
-	}
-
+	if (!md_cluster_ops)
+		request_module("md-cluster");
 	spin_lock(&pers_lock);
+	/* ensure module won't be unloaded */
 	if (!md_cluster_ops || !try_module_get(md_cluster_mod)) {
+		pr_err("can't find md-cluster module or get it's reference.\n");
 		spin_unlock(&pers_lock);
 		return -ENOENT;
 	}


Patches currently in stable-queue which might be from gqjiang@suse.com are

queue-4.4/md-cluster-make-md-cluster-also-can-work-when-compiled-into-kernel.patch