Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.10 22/26] pinctrl: protect pinctrl_list add | Date | Tue, 18 Feb 2014 14:47:18 -0800 |
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3.10-stable review patch. If anyone has any objections, please let me know.
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From: Stanislaw Gruszka <sgruszka@redhat.com>
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@redhat.com> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/pinctrl/core.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/pinctrl/core.c +++ b/drivers/pinctrl/core.c @@ -807,7 +807,9 @@ 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; }
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