diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c index 468de2dddfdb..f87af11fde98 100644 --- a/drivers/soc/qcom/smp2p.c +++ b/drivers/soc/qcom/smp2p.c @@ -270,6 +270,9 @@ static void qcom_smp2p_notify_in(struct qcom_smp2p *smp2p) status = val ^ entry->last_value; entry->last_value = val; + + /* Ensure irq_pending is read correctly */ + mb(); status |= *entry->irq_pending; SMP2P_INFO("%d:\t%s: status:%0lx val:%0x\n", @@ -391,6 +394,11 @@ static int smp2p_retrigger_irq(struct irq_data *irqd) SMP2P_INFO("%d: %s: %lu\n", entry->smp2p->remote_pid, entry->name, irq); set_bit(irq, entry->irq_pending); + /* Ensure irq_pending is visible to all cpus that retried interrupt + * can run on + */ + mb(); + return 0; }