MIPS: Netlogic: Warn on invalid irq

Warn and return if invalid IRQ is passed to nlm_set_pic_extra_ack.

Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6862/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/netlogic/common/irq.c b/arch/mips/netlogic/common/irq.c
index 5afc4b7fce0f12ddb96fd00f54b7a6577b887eb0..c100b9afa0abe85fe31555a06bcc25186345eacd 100644 (file)
--- a/arch/mips/netlogic/common/irq.c
+++ b/arch/mips/netlogic/common/irq.c
@@ -203,6 +203,8 @@ void nlm_set_pic_extra_ack(int node, int irq, void (*xack)(struct irq_data *))
 
        xirq = nlm_irq_to_xirq(node, irq);
        pic_data = irq_get_handler_data(xirq);
+       if (WARN_ON(!pic_data))
+               return;
        pic_data->extra_ack = xack;
 }