firewire: ohci: flush MMIO writes in the interrupt handler

Make sure that interrupt event clear bit writes are executed before the
interrupt handler returns.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 3775364..276324d 100644 (file)
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -1856,7 +1856,8 @@ static irqreturn_t irq_handler(int irq, void *data)
                spin_lock(&ohci->lock);
                update_bus_time(ohci);
                spin_unlock(&ohci->lock);
-       }
+       } else
+               flush_writes(ohci);
 
        return IRQ_HANDLED;
 }