[PATCH 4.14 015/205] powerpc/pseries: add of_node_put() in dlpar_detach_node()

From: Greg Kroah-Hartman
Date: Mon Feb 11 2019 - 10:32:47 EST

4.14-stable review patch. If anyone has any objections, please let me know.


[ Upstream commit 5b3f5c408d8cc59b87e47f1ab9803dbd006e4a91 ]

The previous commit, "of: overlay: add missing of_node_get() in
__of_attach_node_sysfs" added a missing of_node_get() to
__of_attach_node_sysfs(). This results in a refcount imbalance
for nodes attached with dlpar_attach_node(). The calling sequence
from dlpar_attach_node() to __of_attach_node_sysfs() is:


For more detailed description of the node refcount, see
commit 68baf692c435 ("powerpc/pseries: Fix of_node_put() underflow
during DLPAR remove").

Tested-by: Alan Tull <atull@xxxxxxxxxx>
Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Frank Rowand <frank.rowand@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
arch/powerpc/platforms/pseries/dlpar.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index e9149d05d30b..f4e6565dd7a9 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -284,6 +284,8 @@ int dlpar_detach_node(struct device_node *dn)
if (rc)
return rc;

+ of_node_put(dn);
return 0;