diff options
| author | Sathya Perla <sathyap@serverengines.com> | 2010-06-29 00:11:17 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-06-30 13:26:42 -0700 |
| commit | f3eb62d2cc7da7bea4b394dd06f6bc738aa284e7 (patch) | |
| tree | 2e98c0b346690eeca0ea6cad6f8f21a9e16af476 /drivers/net/benet/be_cmds.c | |
| parent | 7e307c7ad5340b226966da6e564ec7f717da3adb (diff) | |
be2net: memory barrier fixes on IBM p7 platform
The ibm p7 architecure seems to reorder memory accesses more
aggressively than previous ppc64 architectures. This requires memory
barriers to ensure that rx/tx doorbells are pressed only after
memory to be DMAed is written.
Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/benet/be_cmds.c')
| -rw-r--r-- | drivers/net/benet/be_cmds.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/benet/be_cmds.c b/drivers/net/benet/be_cmds.c index ee1ad9693c8..65e3260d0f0 100644 --- a/drivers/net/benet/be_cmds.c +++ b/drivers/net/benet/be_cmds.c @@ -25,6 +25,8 @@ static void be_mcc_notify(struct be_adapter *adapter) val |= mccq->id & DB_MCCQ_RING_ID_MASK; val |= 1 << DB_MCCQ_NUM_POSTED_SHIFT; + + wmb(); iowrite32(val, adapter->db + DB_MCCQ_OFFSET); } |