This is a note to let you know that I've just added the patch titled
pinctrl: protect pinctrl_list add
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pinctrl-protect-pinctrl_list-add.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7b320cb1ed2dbd2c5f2a778197baf76fd6bf545a Mon Sep 17 00:00:00 2001
From: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Date: Tue, 4 Feb 2014 09:07:09 +0100
Subject: pinctrl: protect pinctrl_list add
From: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
commit 7b320cb1ed2dbd2c5f2a778197baf76fd6bf545a upstream.
We have few fedora bug reports about list corruption on pinctrl,
for example:
https://bugzilla.redhat.com/show_bug.cgi?id=1051918
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 <sgruszka@xxxxxxxxxx>
Acked-by: Stephen Warren <swarren@xxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pinctrl/core.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -837,7 +837,9 @@ static struct pinctrl *create_pinctrl(st
kref_init(&p->users);
/* 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;
}
Patches currently in stable-queue which might be from sgruszka@xxxxxxxxxx are
queue-3.12/pinctrl-protect-pinctrl_list-add.patch
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