powerpc/pseries: Fix parent_dn reference leak in add_dt_node()

commit b537ca6fede69a281dc524983e5e633d79a10a08 upstream.

A reference to the parent device node is held by add_dt_node() for the
node to be added. If the call to dlpar_configure_connector() fails
add_dt_node() returns ENOENT and that reference is not freed.

Add a call to of_node_put(parent_dn) prior to bailing out after a
failed dlpar_configure_connector() call.

Fixes: 8d5ff320766f ("powerpc/pseries: Make dlpar_configure_connector parent node aware")
Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
index a560a98..6a5e746 100644 (file)
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -225,8 +225,10 @@ static int add_dt_node(__be32 parent_phandle, __be32 drc_index)
                return -ENOENT;
 
        dn = dlpar_configure_connector(drc_index, parent_dn);
-       if (!dn)
+       if (!dn) {
+               of_node_put(parent_dn);
                return -ENOENT;
+       }
 
        rc = dlpar_attach_node(dn);
        if (rc)