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Date:	Tue, 18 Feb 2014 14:47:38 -0800
From:	Greg Kroah-Hartman <>
Cc:	Greg Kroah-Hartman <>,, Stanislaw Gruszka <>,
	Stephen Warren <>,
	Linus Walleij <>
Subject: [PATCH 3.13 37/40] pinctrl: protect pinctrl_list add

3.13-stable review patch.  If anyone has any objections, please let me know.


From: Stanislaw Gruszka <>

commit 7b320cb1ed2dbd2c5f2a778197baf76fd6bf545a upstream.

We have few fedora bug reports about list corruption on pinctrl,
for example:

Most likely corruption happen due lack of protection of pinctrl_list
when adding new nodes to it. Patch corrects that.

Fixes: 42fed7ba44e ("pinctrl: move subsystem mutex to pinctrl_dev struct")
Signed-off-by: Stanislaw Gruszka <>
Acked-by: Stephen Warren <>
Signed-off-by: Linus Walleij <>
Signed-off-by: Greg Kroah-Hartman <>

 drivers/pinctrl/core.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -851,7 +851,9 @@ static struct pinctrl *create_pinctrl(st
 	/* Add the pinctrl handle to the global list */
+	mutex_lock(&pinctrl_list_mutex);
 	list_add_tail(&p->node, &pinctrl_list);
+	mutex_unlock(&pinctrl_list_mutex);
 	return p;

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