IRQs: A bit of sanity when freeing

Check the parameters...

Signed-off-by: Michel Pollet <buserror@gmail.com>

diff --git a/simavr/sim/sim_irq.c b/simavr/sim/sim_irq.c
index 54e319b..92c2c17 100644 (file)
--- a/simavr/sim/sim_irq.c
+++ b/simavr/sim/sim_irq.c
@@ -62,6 +62,8 @@ static avr_irq_hook_t * _avr_alloc_irq_hook(avr_irq_t * irq)
 
 void avr_free_irq(avr_irq_t * irq, uint32_t count)
 {
+       if (!irq || !count)
+               return;
        for (int i = 0; i < count; i++) {
                // purge hooks
                avr_irq_hook_t *hook = irq->hook;