The mailbox_put function must check the notifier block for NULL before trying to unregister it.
Signed-off-by: Fernando Guzman Lugo <[email protected]> Signed-off-by: Suman Anna <[email protected]> --- drivers/mailbox/mailbox.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c index eaaf87e..c38241a 100644 --- a/drivers/mailbox/mailbox.c +++ b/drivers/mailbox/mailbox.c @@ -473,7 +473,8 @@ EXPORT_SYMBOL(mailbox_get); void mailbox_put(struct mailbox *mbox, struct notifier_block *nb) { - blocking_notifier_chain_unregister(&mbox->notifier, nb); + if (nb) + blocking_notifier_chain_unregister(&mbox->notifier, nb); mailbox_fini(mbox); } EXPORT_SYMBOL(mailbox_put); -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
