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Date:   Mon, 18 Feb 2019 14:42:16 +0100
From:   Greg Kroah-Hartman <>
Cc:     Greg Kroah-Hartman <>,, Alan Tull <>,
        Michael Ellerman <>,
        Frank Rowand <>,
        Sasha Levin <>
Subject: [PATCH 4.4 008/143] powerpc/pseries: add of_node_put() in dlpar_detach_node()

4.4-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 <>
Acked-by: Michael Ellerman <>
Signed-off-by: Frank Rowand <>
Signed-off-by: Sasha Levin <>
 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 96536c969c9c..a8efed3b4691 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -280,6 +280,8 @@ int dlpar_detach_node(struct device_node *dn)
 	if (rc)
 		return rc;
+	of_node_put(dn);
 	return 0;

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