From: Christoph Hellwig <hch@lst.de>
Date: Wed, 7 Mar 2018 13:13:58 +0000 (+0100)
Subject: Revert "nvme: create 'slaves' and 'holders' entries for hidden controllers"
X-Git-Tag: v4.15.10~91
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=822996a14a2f108ed39862ca18978d66b4e33c91;p=thirdparty%2Fkernel%2Fstable.git

Revert "nvme: create 'slaves' and 'holders' entries for hidden controllers"

commit 8a30ecc6e0ecbb9ae95daf499b2680b885ed0349 upstream.

This reverts commit e9a48034d7d1318ece7d4a235838a86c94db9d68.

The slaves and holders link for the hidden gendisks confuse lsblk so that
it errors out on, or doesn't report the nvme multipath devices.  Given
that we don't need holder relationships for something that can't even be
directly accessed we should just stop creating those links.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Potnuri Bharat Teja <bharat@chelsio.com>
Cc: stable@vger.kernel.org
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 839650e0926af..3551fbd6fe412 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2950,7 +2950,6 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
 
 	if (new)
 		nvme_mpath_add_disk(ns->head);
-	nvme_mpath_add_disk_links(ns);
 	return;
  out_unlink_ns:
 	mutex_lock(&ctrl->subsys->lock);
@@ -2970,7 +2969,6 @@ static void nvme_ns_remove(struct nvme_ns *ns)
 		return;
 
 	if (ns->disk && ns->disk->flags & GENHD_FL_UP) {
-		nvme_mpath_remove_disk_links(ns);
 		sysfs_remove_group(&disk_to_dev(ns->disk)->kobj,
 					&nvme_ns_id_attr_group);
 		if (ns->ndev)
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 1218a9fca8466..cf16905d25e23 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -245,25 +245,6 @@ void nvme_mpath_add_disk(struct nvme_ns_head *head)
 			head->disk->disk_name);
 }
 
-void nvme_mpath_add_disk_links(struct nvme_ns *ns)
-{
-	struct kobject *slave_disk_kobj, *holder_disk_kobj;
-
-	if (!ns->head->disk)
-		return;
-
-	slave_disk_kobj = &disk_to_dev(ns->disk)->kobj;
-	if (sysfs_create_link(ns->head->disk->slave_dir, slave_disk_kobj,
-			kobject_name(slave_disk_kobj)))
-		return;
-
-	holder_disk_kobj = &disk_to_dev(ns->head->disk)->kobj;
-	if (sysfs_create_link(ns->disk->part0.holder_dir, holder_disk_kobj,
-			kobject_name(holder_disk_kobj)))
-		sysfs_remove_link(ns->head->disk->slave_dir,
-			kobject_name(slave_disk_kobj));
-}
-
 void nvme_mpath_remove_disk(struct nvme_ns_head *head)
 {
 	if (!head->disk)
@@ -278,14 +259,3 @@ void nvme_mpath_remove_disk(struct nvme_ns_head *head)
 	blk_cleanup_queue(head->disk->queue);
 	put_disk(head->disk);
 }
-
-void nvme_mpath_remove_disk_links(struct nvme_ns *ns)
-{
-	if (!ns->head->disk)
-		return;
-
-	sysfs_remove_link(ns->disk->part0.holder_dir,
-			kobject_name(&disk_to_dev(ns->head->disk)->kobj));
-	sysfs_remove_link(ns->head->disk->slave_dir,
-			kobject_name(&disk_to_dev(ns->disk)->kobj));
-}
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index a00eabd064273..55c49a1aa2311 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -405,9 +405,7 @@ bool nvme_req_needs_failover(struct request *req);
 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
 void nvme_mpath_add_disk(struct nvme_ns_head *head);
-void nvme_mpath_add_disk_links(struct nvme_ns *ns);
 void nvme_mpath_remove_disk(struct nvme_ns_head *head);
-void nvme_mpath_remove_disk_links(struct nvme_ns *ns);
 
 static inline void nvme_mpath_clear_current_path(struct nvme_ns *ns)
 {
@@ -448,12 +446,6 @@ static inline void nvme_mpath_add_disk(struct nvme_ns_head *head)
 static inline void nvme_mpath_remove_disk(struct nvme_ns_head *head)
 {
 }
-static inline void nvme_mpath_add_disk_links(struct nvme_ns *ns)
-{
-}
-static inline void nvme_mpath_remove_disk_links(struct nvme_ns *ns)
-{
-}
 static inline void nvme_mpath_clear_current_path(struct nvme_ns *ns)
 {
 }