firmware: Fix a reference count leak.
stable inclusion from linux-4.19.139 commit 937dafe8682044e70821c886d9063869744b3057 -------------------------------- [ Upstream commit fe3c6068 ] kobject_init_and_add() takes reference even when it fails. If this function returns an error, kobject_put() must be called to properly clean up the memory associated with the object. Callback function fw_cfg_sysfs_release_entry() in kobject_put() can handle the pointer "entry" properly. Signed-off-by: NQiushi Wu <wu000273@umn.edu> Link: https://lore.kernel.org/r/20200613190533.15712-1-wu000273@umn.eduSigned-off-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NSasha Levin <sashal@kernel.org> Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
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