linux-kernel - Applied "regulator: Fix regulator_summary for deviceless consumers" to the regulator tree

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Date:   Thu, 16 Feb 2017 12:45:28 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Leonard Crestez <leonard.crestez@....com>
Cc:     Mark Brown <broonie@...nel.org>, stable@...r.kernel.org,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Heiko Stuebner <heiko@...ech.de>, linux-kernel@...r.kernel.org,
        Octavian Purdila <octavian.purdila@....com>,
        linux-kernel@...r.kernel.org
Subject: Applied "regulator: Fix regulator_summary for deviceless consumers" to the regulator tree

The patch

   regulator: Fix regulator_summary for deviceless consumers

has been applied to the regulator tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From e42a46b6f52473661ad192f76a128a68fe301df4 Mon Sep 17 00:00:00 2001
From: Leonard Crestez <leonard.crestez@....com>
Date: Tue, 14 Feb 2017 17:31:03 +0200
Subject: [PATCH] regulator: Fix regulator_summary for deviceless consumers

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@....com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Cc: stable@...r.kernel.org
---
 drivers/regulator/core.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 04baac9a165b..66319542baa6 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -4391,12 +4391,13 @@ 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:
-- 
2.11.0