+ memory-tier-release-the-new_memtier-in-find_create_memory_tier.patch added to mm-unstable branch

+ memory-tier-release-the-new_memtier-in-find_create_memory_tier.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: memory tier: release the new_memtier in find_create_memory_tier()
has been added to the -mm mm-unstable branch.  Its filename is
     memory-tier-release-the-new_memtier-in-find_create_memory_tier.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/memory-tier-release-the-new_memtier-in-find_create_memory_tier.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Tong Tiangen <tongtiangen@huawei.com>
Subject: memory tier: release the new_memtier in find_create_memory_tier()
Date: Sun, 29 Jan 2023 04:06:51 +0000

In find_create_memory_tier(), if failed to register device, then we should
release new_memtier from the tier list and put device instead of memtier.

Link: https://lkml.kernel.org/r/20230129040651.1329208-1-tongtiangen@huawei.com
Fixes: 9832fb87834e ("mm/demotion: expose memory tier details via sysfs")
Signed-off-by: Tong Tiangen <tongtiangen@huawei.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Guohanjun <guohanjun@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/mm/memory-tiers.c~memory-tier-release-the-new_memtier-in-find_create_memory_tier
+++ a/mm/memory-tiers.c
@@ -211,8 +211,8 @@ static struct memory_tier *find_create_m
 
 	ret = device_register(&new_memtier->dev);
 	if (ret) {
-		list_del(&memtier->list);
-		put_device(&memtier->dev);
+		list_del(&new_memtier->list);
+		put_device(&new_memtier->dev);
 		return ERR_PTR(ret);
 	}
 	memtier = new_memtier;
_

Patches currently in -mm which might be from tongtiangen@huawei.com are

memory-tier-release-the-new_memtier-in-find_create_memory_tier.patch