net: hns3: use writel() to optimize the barrier operation

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writel() can be used to order I/O vs memory by default when
writing portable drivers. Use writel() to replace wmb() +
writel_relaxed(), and writel() is dma_wmb() + writel_relaxed()
for ARM64, so there is an optimization here because dma_wmb()
is a lighter barrier than wmb().

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Yunsheng Lin 2020-09-16 17:33:49 +08:00 • committed by David S. Miller

parent 8c30e19460

commit 48ee56fd0b

2 changed files with 3 additions and 8 deletions

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8

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

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3

drivers/net/ethernet/hisilicon/hns3/hns3_enet.h

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