Re: [PATCH v4] wifi: ath10k: make in-order rx amsdu buffers persistent

[Andrey Derkach]

On Tue, 20 Oct 2026 20:52:07 +0200, David Heidelberg wrote:
> The WCN3990 firmware may split an A-MSDU across multiple HTT "in-order"
> indications. Mainline drops these ("failed to extract amsdu: -11",
> rx_confused, recovery), collapsing throughput under load on affected
> devices. Stash the MSDUs of an incomplete MPDU in the driver state so
> it can be completed by the next indication instead of being dropped.

Tested on a Lenovo S5 Pro (SDM636) with a 7.2.3-based tree, on top of
"wifi: ath10k: trigger hardware recovery upon rx failures", replacing
the older out-of-tree version of this patch we carried before.

During TCP downloads the firmware split an A-MSDU across two in-order
indications (once in about 39,000 indications so far, counted with
kprobes on the stash and resume paths). The patch stashed the MSDUs and
the next indication completed the MPDU, with no warning and no
recovery. Throughput is the same as with the old version, about
60 Mbit/s here.

Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.1.0.1.c2-00455-QCAHLSWMTPLZ-1

Tested-by: Andrey Derkach <gabin278@xxxxxxxxx>