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Subject[PATCH] mm: memory_hotplug: use put_device() if device_register fail
Date
if device_register() returned an error. Always use put_device()
to give up the initialized reference and release allocated memory.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
drivers/base/memory.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index bffe861..f5e5601 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -649,13 +649,19 @@ static const struct attribute_group *memory_memblk_attr_groups[] = {
static
int register_memory(struct memory_block *memory)
{
+ int ret;
+
memory->dev.bus = &memory_subsys;
memory->dev.id = memory->start_section_nr / sections_per_block;
memory->dev.release = memory_block_release;
memory->dev.groups = memory_memblk_attr_groups;
memory->dev.offline = memory->state == MEM_OFFLINE;

- return device_register(&memory->dev);
+ ret = device_register(&memory->dev);
+ if (ret)
+ put_device(&memory->dev);
+
+ return ret;
}

static int init_memory_block(struct memory_block **memory,
--
2.7.4
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