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-rw-r--r--kernel/irq/handle.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 3ff7b925c387..51df337b37db 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -117,14 +117,16 @@ fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs)
117 /* 117 /*
118 * No locking required for CPU-local interrupts: 118 * No locking required for CPU-local interrupts:
119 */ 119 */
120 desc->handler->ack(irq); 120 if (desc->handler->ack)
121 desc->handler->ack(irq);
121 action_ret = handle_IRQ_event(irq, regs, desc->action); 122 action_ret = handle_IRQ_event(irq, regs, desc->action);
122 desc->handler->end(irq); 123 desc->handler->end(irq);
123 return 1; 124 return 1;
124 } 125 }
125 126
126 spin_lock(&desc->lock); 127 spin_lock(&desc->lock);
127 desc->handler->ack(irq); 128 if (desc->handler->ack)
129 desc->handler->ack(irq);
128 /* 130 /*
129 * REPLAY is when Linux resends an IRQ that was dropped earlier 131 * REPLAY is when Linux resends an IRQ that was dropped earlier
130 * WAITING is used by probe to mark irqs that are being tested 132 * WAITING is used by probe to mark irqs that are being tested