The mailbox_put function must check the notifier block for
NULL before trying to unregister it.
Signed-off-by: Fernando Guzman Lugo <lugo.fernando@xxxxxxxxx>
Signed-off-by: Suman Anna <s-anna@xxxxxx>
---
arch/arm/plat-omap/mailbox.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c
index 42377ef..5fb4027 100644
--- a/arch/arm/plat-omap/mailbox.c
+++ b/arch/arm/plat-omap/mailbox.c
@@ -356,7 +356,8 @@ EXPORT_SYMBOL(omap_mbox_get);
void omap_mbox_put(struct omap_mbox *mbox, struct notifier_block *nb)
{
- blocking_notifier_chain_unregister(&mbox->notifier, nb);
+ if (nb)
+ blocking_notifier_chain_unregister(&mbox->notifier, nb);
omap_mbox_fini(mbox);
}
EXPORT_SYMBOL(omap_mbox_put);
--
1.8.2
--
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