From: Clemens Ladisch <clemens@ladisch.de>
Date: Tue, 30 Nov 2010 07:24:19 +0000 (+0100)
Subject: firewire: ohci: flush MMIO writes in the interrupt handler
X-Git-Tag: firefly_0821_release~3680^2~4548^2~54
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e597e9898abe45beff4696159c7fe5c96f53e581;p=firefly-linux-kernel-4.4.55.git

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 3775364f1b51..276324d741df 100644
--- 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;
 }