pinctrl: protect pinctrl_list add
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: 42fed7ba44
("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>
This commit is contained in:
parent
c2b570f3e4
commit
1fc42b84b4
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@ -807,7 +807,9 @@ static struct pinctrl *create_pinctrl(struct device *dev)
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kref_init(&p->users);
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/* Add the pinctrl handle to the global list */
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mutex_lock(&pinctrl_list_mutex);
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list_add_tail(&p->node, &pinctrl_list);
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mutex_unlock(&pinctrl_list_mutex);
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return p;
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}
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