regulator: Fix regulator_summary for deviceless consumers

commit e42a46b6f52473661ad192f76a128a68fe301df4 upstream.

It is allowed to call regulator_get with a NULL dev argument
(_regulator_get explicitly checks for it) but this causes an error later
when printing /sys/kernel/debug/regulator_summary.

Fix this by explicitly handling "deviceless" consumers in the debugfs code.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 5c1519b229e0..9faccfceb53c 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -4357,12 +4357,13 @@ static void regulator_summary_show_subtree(struct seq_file *s,
         seq_puts(s, "\n");
 
         list_for_each_entry(consumer, &rdev->consumer_list, list) {
-                if (consumer->dev->class == &regulator_class)
+                if (consumer->dev && consumer->dev->class == &regulator_class)
                         continue;
 
                 seq_printf(s, "%*s%-*s ",
                            (level + 1) * 3 + 1, "",
-                           30 - (level + 1) * 3, dev_name(consumer->dev));
+                           30 - (level + 1) * 3,
+                           consumer->dev ? dev_name(consumer->dev) : "deviceless");
 
                 switch (rdev->desc->type) {
                 case REGULATOR_VOLTAGE: