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authorStanislaw Gruszka <sgruszka@redhat.com>2014-02-04 12:07:09 +0400
committerLinus Walleij <linus.walleij@linaro.org>2014-02-05 00:59:45 +0400
commit7b320cb1ed2dbd2c5f2a778197baf76fd6bf545a (patch)
tree635601d6b411639a5597069a73a2ff5b4321686a /drivers/pinctrl/core.c
parentfa74d0d3e30cf079e94db327ea6d4726cd7d5871 (diff)
downloadlinux-7b320cb1ed2dbd2c5f2a778197baf76fd6bf545a.tar.xz
pinctrl: protect pinctrl_list add
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") Cc: stable@vger.kernel.org Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl/core.c')
-rw-r--r--drivers/pinctrl/core.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 5ee61a470016..cab020a58bf5 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -851,7 +851,9 @@ static struct pinctrl *create_pinctrl(struct device *dev)
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;
}