From: Dan Williams <dan.j.williams@intel.com>
Date: Sat, 9 Jul 2016 23:46:29 +0000 (-0700)
Subject: libnvdimm: keep region data alive over namespace removal
X-Git-Tag: v4.8-rc1~114^2^2~23
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a8f720224eff09ea684b7f74aa1c0dff3da03170;p=karo-tx-linux.git

libnvdimm: keep region data alive over namespace removal

nd_region device driver data will be used in the namespace i/o path.
Re-order nd_region_remove() to ensure this data stays live across
namespace device removal

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

diff --git a/drivers/nvdimm/region.c b/drivers/nvdimm/region.c
index 333175dac8d5..8f241772ec0b 100644
--- a/drivers/nvdimm/region.c
+++ b/drivers/nvdimm/region.c
@@ -82,6 +82,8 @@ static int nd_region_remove(struct device *dev)
 {
 	struct nd_region *nd_region = to_nd_region(dev);
 
+	device_for_each_child(dev, NULL, child_unregister);
+
 	/* flush attribute readers and disable */
 	nvdimm_bus_lock(dev);
 	nd_region->ns_seed = NULL;
@@ -91,7 +93,6 @@ static int nd_region_remove(struct device *dev)
 	dev_set_drvdata(dev, NULL);
 	nvdimm_bus_unlock(dev);
 
-	device_for_each_child(dev, NULL, child_unregister);
 	return 0;
 }