From: zhong jiang zhongjiang@huawei.com
[ Upstream commit d2ab99403ee00d8014e651728a4702ea1ae5e52c ]
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 Signed-off-by: Sasha Levin sashal@kernel.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 8e5818e735e2f..fe1557aa9b103 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -519,7 +519,7 @@ memory_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,