powerpc/pseries/mobility: Add pr_debug() for device tree changes

When investigating issues with partition migration or resource
reassignments it is helpful to have a log of which nodes and
properties in the device tree have changed. Use pr_debug() so it's
easy to enable these at runtime with the dynamic debug facility.

Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190627053044.9238-3-nathanl@linux.ibm.com

diff --git a/arch/powerpc/platforms/pseries/mobility.c b/arch/powerpc/platforms/pseries/mobility.c
index 0ede49a35121b06d5c82efb8059166c0f077f61c..d6f4162478a505448acfac6d64907f3a7824fc1d 100644 (file)
--- a/arch/powerpc/platforms/pseries/mobility.c
+++ b/arch/powerpc/platforms/pseries/mobility.c
@@ -67,6 +67,8 @@ static int delete_dt_node(__be32 phandle)
        if (!dn)
                return -ENOENT;
 
+       pr_debug("removing node %pOFfp\n", dn);
+
        dlpar_detach_node(dn);
        of_node_put(dn);
        return 0;
@@ -125,6 +127,7 @@ static int update_dt_property(struct device_node *dn, struct property **prop,
        }
 
        if (!more) {
+               pr_debug("updating node %pOF property %s\n", dn, name);
                of_update_property(dn, new_prop);
                *prop = NULL;
        }
@@ -243,6 +246,8 @@ static int add_dt_node(__be32 parent_phandle, __be32 drc_index)
        if (rc)
                dlpar_free_cc_nodes(dn);
 
+       pr_debug("added node %pOFfp\n", dn);
+
        of_node_put(parent_dn);
        return rc;
 }