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authorAlexander Duyck <alexander.h.duyck@linux.intel.com>2018-09-25 20:53:02 (GMT)
committerDan Williams <dan.j.williams@intel.com>2018-09-26 19:02:31 (GMT)
commitb6eae0f61db27748606cc00dafcfd1e2c032f0a5 (patch)
tree98569b815acec26be1d8a78ddfcecd4ac8cd60c7 /drivers/nvdimm
parent3c5c98d135f50c516631806ce77e50e7ce33bde8 (diff)
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: <stable@vger.kernel.org> Fixes: 4d88a97aa9e8 ("libnvdimm: ...base ... infrastructure") Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/bus.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 8aae6dc..9148015 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);

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