commit 2f714ba1282aa6f5f0158329a1b2d3858698618c
author Leonard Crestez <leonard.crestez@nxp.com> Tue Feb 14 17:31:03 2017 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Sun Mar 12 06:41:43 2017 +0100
tree f0c63de54cadd3b72d7fa6835e88b92de44399b8
parent 59cd503c8cfd3f69f8126165b274860bbbd058db

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>

drivers/regulator/core.c

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 5c1519b..9faccfc 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -4357,12 +4357,13 @@
 	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: