From: Jon Mason <jon.mason@intel.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
Dave Jiang <dave.jiang@intel.com>,
Nicholas Bellinger <nab@linux-iscsi.org>
Subject: [PATCH 03/21] NTB: correct memory barrier
Date: Sat, 19 Jan 2013 02:02:17 -0700 [thread overview]
Message-ID: <1358586155-23322-4-git-send-email-jon.mason@intel.com> (raw)
In-Reply-To: <1358586155-23322-1-git-send-email-jon.mason@intel.com>
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@intel.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
next prev parent reply other threads:[~2013-01-19 9:03 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-19 9:02 [PATCH 0/21] NTB and ntb_netdev patches Jon Mason
2013-01-19 9:02 ` [PATCH 01/21] NTB: correct missing readq/writeq errors Jon Mason
2013-01-20 23:40 ` Greg KH
2013-01-21 17:38 ` Jon Mason
2013-01-21 18:23 ` Greg KH
2013-01-21 20:34 ` Ben Hutchings
2013-01-21 20:47 ` Greg KH
2013-01-19 9:02 ` [PATCH 02/21] NTB: Handle ntb client device probes without present hardware Jon Mason
2013-01-19 9:02 ` Jon Mason [this message]
2013-01-19 9:02 ` [PATCH 04/21] NTB: separate transmit and receive windows Jon Mason
2013-01-19 9:02 ` [PATCH 05/21] NTB: No sleeping in interrupt context Jon Mason
2013-01-19 9:02 ` [PATCH 06/21] NTB: use simple_open for debugfs Jon Mason
2013-01-19 9:02 ` [PATCH 07/21] NTB: zero PCI driver data Jon Mason
2013-01-20 23:41 ` Greg KH
2013-01-19 9:02 ` [PATCH 08/21] NTB: declare unused variables Jon Mason
2013-01-20 23:42 ` Greg KH
2013-01-21 17:50 ` Jon Mason
2013-01-21 18:25 ` Greg KH
2013-01-19 9:02 ` [PATCH 09/21] NTB: namespacecheck cleanups Jon Mason
2013-01-19 9:02 ` [PATCH 10/21] NTB: whitespace cleanups Jon Mason
2013-01-19 9:02 ` [PATCH 11/21] NTB: correct stack usage warning in debugfs_read Jon Mason
2013-01-19 9:02 ` [PATCH 12/21] NTB: Remove reads across NTB Jon Mason
2013-01-19 9:02 ` [PATCH 13/21] NTB: Out of free receive entries issue Jon Mason
2013-01-19 9:02 ` [PATCH 14/21] NTB: Fix Sparse Warnings Jon Mason
2013-01-20 23:45 ` Greg KH
2013-01-21 21:13 ` Jon Mason
2013-01-21 21:37 ` Greg KH
2013-01-21 22:28 ` Jon Mason
2013-01-19 9:02 ` [PATCH 15/21] NTB: Update Version Jon Mason
2013-01-20 23:47 ` Greg KH
2013-01-21 17:57 ` Jon Mason
2013-01-21 18:26 ` Greg KH
2013-01-19 9:02 ` [PATCH 16/21] ntb_netdev: remove init/exit from probe/remove Jon Mason
2013-01-19 9:02 ` [PATCH 17/21] ntb_netdev: correct skb leak Jon Mason
2013-01-19 9:02 ` [PATCH 18/21] ntb_netdev: remove tx timeout Jon Mason
2013-01-19 9:02 ` [PATCH 19/21] ntb_netdev: declare unused variables and fix missing initializer Jon Mason
2013-01-20 23:47 ` Greg KH
2013-01-19 9:02 ` [PATCH 20/21] ntb_netdev: improve logging Jon Mason
2013-01-19 18:51 ` Joe Perches
2013-01-19 9:02 ` [PATCH 21/21] ntb_netdev: Update Version Jon Mason
2013-01-20 23:48 ` [PATCH 0/21] NTB and ntb_netdev patches Greg KH
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