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Date: Sat, 19 Jan 2013 02:02:17 -0700 From: Jon Mason <jon.mason@...el.com> To: Greg KH <gregkh@...uxfoundation.org> Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org, Dave Jiang <dave.jiang@...el.com>, Nicholas Bellinger <nab@...ux-iscsi.org> Subject: [PATCH 03/21] 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 <jon.mason@...el.com> --- 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); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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