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| author | Jon Mason <jon.mason@intel.com> | 2013-01-19 02:02:17 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-20 15:45:50 -0800 |
| commit | 842c1ddea5f9949cb21e568408d2af9d986eee69 (patch) | |
| tree | 02970fc4c58f1e564f2f7bb90632bf805f8cdcf8 | |
| parent | 8222b402e2df3b92948141046bae82fb774f3f64 (diff) | |
| download | op-kernel-dev-842c1ddea5f9949cb21e568408d2af9d986eee69.zip op-kernel-dev-842c1ddea5f9949cb21e568408d2af9d986eee69.tar.gz | |
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@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/ntb/ntb_transport.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); |
