This is a note to let you know that I've just added the patch titled

mm/memory_hotplug: Do not unlock when fails to take the

to my driver-core git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git in the driver-core-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the driver-core-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

From d2ab99403ee00d8014e651728a4702ea1ae5e52c Mon Sep 17 00:00:00 2001

From: zhong jiang zhongjiang@huawei.com Date: Mon, 8 Apr 2019 12:07:17 +0800 Subject: mm/memory_hotplug: Do not unlock when fails to take the device_hotplug_lock

When adding the memory by probing memory block in sysfs interface, there is an obvious issue that we will unlock the device_hotplug_lock when fails to takes it.

That issue was introduced in Commit 8df1d0e4a265 ("mm/memory_hotplug: make add_memory() take the device_hotplug_lock")

We should drop out in time when fails to take the device_hotplug_lock.

Fixes: 8df1d0e4a265 ("mm/memory_hotplug: make add_memory() take the device_hotplug_lock") Reported-by: Yang yingliang yangyingliang@huawei.com Signed-off-by: zhong jiang zhongjiang@huawei.com Reviewed-by: Oscar Salvador osalvador@suse.de Reviewed-by: David Hildenbrand david@redhat.com Acked-by: Michal Hocko mhocko@suse.com Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/base/memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/memory.c b/drivers/base/memory.c index cb8347500ce2..e49028a60429 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -506,7 +506,7 @@ static ssize_t probe_store(struct device *dev, struct device_attribute *attr,

ret = lock_device_hotplug_sysfs(); if (ret) - goto out; + return ret;

nid = memory_add_physaddr_to_nid(phys_addr); ret = __add_memory(nid, phys_addr,