Dropping HTT Rx

Michal Kazior michal.kazior at tieto.com
Mon Jun 30 03:49:50 PDT 2014

On 30 June 2014 12:23, Yeoh Chun-Yeow <yeohchunyeow at gmail.com> wrote:
> Hi, all
> I have encounter a lot of the following dmesg when bringing up the ath10k as AP:
> [ 245.310000] ath10k: htt rx dropping due to zero-len
> [ 245.330000] ath10k: htt rx dropping due to zero-len
> What could be the problem?

I'm guessing hardware reports incomplete msdu/mpdu frames. It's harmless.

If you're really curious you can check if the rx attention flags have
RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR. This is currently verified in
ath10k_htt_rx_amsdu_pop() and msdu_len is zeroed for safety.


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