diff options
| author |   Sinan Kaya <okaya@codeaurora.org> | 2018-03-25 10:39:18 -0400 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-03-26 12:47:55 -0400 |
| commit | 7f883c774e1bad34d5474d8a74989336631ce178 (patch) | |
| tree | 5f7d9a0dba0a4879a03776e8f41890d4feb6bf23 /drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c | |
| parent | bnx2x: Replace doorbell barrier() with wmb() (diff) | |
| download | linux-dev-7f883c774e1bad34d5474d8a74989336631ce178.tar.xz linux-dev-7f883c774e1bad34d5474d8a74989336631ce178.zip | |
bnx2x: Eliminate duplicate barriers on weakly-ordered archs
Code includes wmb() followed by writel(). writel() already has a
barrier on some architectures like arm64.
This ends up CPU observing two barriers back to back before executing
the register write.
Since code already has an explicit barrier call, changing writel() to
writel_relaxed().
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c index 0f86f1850de8..95871576ab92 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c @@ -4156,7 +4156,7 @@ netdev_tx_t bnx2x_start_xmit(struct sk_buff *skb, struct net_device *dev) /* make sure descriptor update is observed by HW */ wmb(); - DOORBELL(bp, txdata->cid, txdata->tx_db.raw); + DOORBELL_RELAXED(bp, txdata->cid, txdata->tx_db.raw); mmiowb(); |