From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net] net: hns: fix for unmapping problem when SMMU is on
Date: Tue, 25 Sep 2018 10:43:36 -0700 (PDT)
Message-ID: <20180925.104336.2276354373880447447.davem@davemloft.net>
References: <20180925092155.11024-1-salil.mehta@huawei.com>
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Cc: yisen.zhuang@huawei.com, lipeng321@huawei.com,
        mehta.salil@opnsrc.net, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, linuxarm@huawei.com,
        linyunsheng@huawei.com
To: salil.mehta@huawei.com
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From: Salil Mehta <salil.mehta@huawei.com>
Date: Tue, 25 Sep 2018 10:21:55 +0100

> From: Yunsheng Lin <linyunsheng@huawei.com>
> 
> If SMMU is on, there is more likely that skb_shinfo(skb)->frags[i]
> can not send by a single BD. when this happen, the
> hns_nic_net_xmit_hw function map the whole data in a frags using
> skb_frag_dma_map, but unmap each BD' data individually when tx is
> done, which causes problem when SMMU is on.
> 
> This patch fixes this problem by ummapping the whole data in a
> frags when tx is done.
> 
> Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
> Signed-off-by: Peng Li <lipeng321@huawei.com>
> Reviewed-by: Yisen Zhuang <yisen.zhuang@huawei.com>
> Signed-off-by: Salil Mehta <salil.mehta@huawei.com>

Applied, thank you.