From b6eae0f61db27748606cc00dafcfd1e2c032f0a5 Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 25 Sep 2018 13:53:02 -0700 Subject: libnvdimm: Hold reference on parent while scheduling async init Unlike asynchronous initialization in the core we have not yet associated the device with the parent, and as such the device doesn't hold a reference to the parent. In order to resolve that we should be holding a reference on the parent until the asynchronous initialization has completed. Cc: Fixes: 4d88a97aa9e8 ("libnvdimm: ...base ... infrastructure") Signed-off-by: Alexander Duyck Signed-off-by: Dan Williams --- drivers/nvdimm/bus.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/nvdimm/bus.c') diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 8aae6dcc839f..9148015ed803 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -488,6 +488,8 @@ static void nd_async_device_register(void *d, async_cookie_t cookie) put_device(dev); } put_device(dev); + if (dev->parent) + put_device(dev->parent); } static void nd_async_device_unregister(void *d, async_cookie_t cookie) @@ -507,6 +509,8 @@ void __nd_device_register(struct device *dev) if (!dev) return; dev->bus = &nvdimm_bus_type; + if (dev->parent) + get_device(dev->parent); get_device(dev); async_schedule_domain(nd_async_device_register, dev, &nd_async_domain); -- cgit v1.2.3