diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index e2d99a3ac07d..63063741fbd1 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -672,10 +672,18 @@ static irqreturn_t svc_i3c_master_irq_handler(int irq, void *dev_id) /* Clear the interrupt status */ writel(SVC_I3C_MINT_SLVSTART, master->regs + SVC_I3C_MSTATUS); - /* Ignore the false event */ - if (svc_has_quirk(master, SVC_I3C_QUIRK_FALSE_SLVSTART) && - !SVC_I3C_MSTATUS_STATE_SLVREQ(active)) - return IRQ_HANDLED; + if (svc_has_quirk(master, SVC_I3C_QUIRK_FALSE_SLVSTART)) { + /* + * Re-read MSTATUS to obtain the latest state and avoid + * missing an IBI that arrives after MSTATUS is latched + * but before SLVSTART is cleared. + */ + active = readl(master->regs + SVC_I3C_MSTATUS); + + /* Ignore the false event */ + if (!SVC_I3C_MSTATUS_STATE_SLVREQ(active)) + return IRQ_HANDLED; + } /* * The SDA line remains low until the request is processed.