From 842c1ddea5f9949cb21e568408d2af9d986eee69 Mon Sep 17 00:00:00 2001 From: Jon Mason Date: Sat, 19 Jan 2013 02:02:17 -0700 Subject: [PATCH] NTB: correct memory barrier mmiowb is not sufficient to flush the data and is causing data corruption. Change to wmb and the data corruption is no more. Signed-off-by: Jon Mason Signed-off-by: Greg Kroah-Hartman --- drivers/ntb/ntb_transport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index 1d17857..e9666bd 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -1009,7 +1009,7 @@ static void ntb_tx_copy_task(struct ntb_transport_qp *qp, hdr->ver = qp->tx_pkts; /* Ensure that the data is fully copied out before setting the flag */ - mmiowb(); + wmb(); hdr->flags = entry->flags | DESC_DONE_FLAG; ntb_ring_sdb(qp->ndev, qp->qp_num); -- 2.7.4