powerpc/pseries: Fix node leak in update_lmb_associativity_index()

[ Upstream commit 47918bc68b7427e961035949cc1501a864578a69 ]

In update_lmb_associativity_index() we lookup dr_node using
of_find_node_by_path() which takes a reference for us. In the
non-error case we forget to drop the reference. Note that
find_aa_index() does modify properties of the node, but doesn't need
an extra reference held once it's returned.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 656bbbd..6c12b02 100644 (file)
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -294,6 +294,7 @@ static u32 lookup_lmb_associativity_index(struct of_drconf_cell *lmb)
 
        aa_index = find_aa_index(dr_node, ala_prop, lmb_assoc);
 
+       of_node_put(dr_node);
        dlpar_free_cc_nodes(lmb_node);
        return aa_index;
 }