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Date:   Sat, 26 Sep 2020 21:30:23 +0200
From:   Hauke Mehrtens <>
To:     David Miller <>
Subject: Re: [PATCH v2] net: lantiq: Add locking for TX DMA channel

On 9/24/20 3:01 AM, David Miller wrote:
> From: Hauke Mehrtens <>
> Date: Tue, 22 Sep 2020 23:41:12 +0200
>> The TX DMA channel data is accessed by the xrx200_start_xmit() and the
>> xrx200_tx_housekeeping() function from different threads. Make sure the
>> accesses are synchronized by acquiring the netif_tx_lock() in the
>> xrx200_tx_housekeeping() function too. This lock is acquired by the
>> kernel before calling xrx200_start_xmit().
>> Signed-off-by: Hauke Mehrtens <>
> Applied, but...
> You posted this really fast after my feedback, so I have to ask if you
> actually functionally tested this patch?

Hi David,

I created the patch first, then tested it with ipef3 (iperf3 -c -P 10 -t 30 and reverse) multiple times and send both mails.

I did not see any problems, but it could still be that I miss more problems.


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