[OpenWrt-Devel] ath10k QCA9880 firmware TX hang

[Hauke Mehrtens]

On 10/19/19 1:43 PM, David Bauer wrote:
> Hello,
> 
> while preparing the switch to 19.07 for the mesh-framework Gluon, we found an issue
> with ath10k, which results in an overflowing TX queue in the kernel. The QCA9880 does
> not send TX_DONE or TX_FAILED messages back to the driver, which results in the SKBs never
> being freed. Both HTT_COOKIES counters are also frozen when this happens.
> 
> This happens when using 10.2.4-1.0-00045 (current in linux-firmware) and
> 10.2.4-1.0-00037 firmware (shipped with OpenWrt 18.06). However, it seems to be fixed in
> 10.2.4-1.0-00047.
> 
> We have some statistical data about this issue here. [1]
> As you can see, the issue started with the switch to OpenWrt on 26. September and
> was resolved on 5th October (we did some testing afterwards, so we didn't reach a continuous
> uptime)
> 
> We've also tried ath10k-ct firmware (which does not seem to show the issue), however this is
> an option for us, as we need 802.11s meshing on our devices (the described issue however does also
> happen when using a single AP VIF).
> 
> As an interim fix, i would propose to switch to the 10.2.4-1.0-00047 firmware for the QCA9880/QCA9887.
> This would include switching to ath10k-firmware repository from kvalo for both firmware files.
> 
> Any objections on this?
> 
> [1] https://stats.darmstadt.freifunk.net/d/000000021/router-meshviewer-export?orgId=1&var-node=f09fc2dec4c5&from=1569466967823&to=1570394540260
> 
> Best wishes
> David
Hi David,

The linux-firmeware package was updated and contains the new ath10k
firmware now:
ath10k: QCA9984 hw1.0: update firmware-5.bin to 10.4-3.9.0.2-00070
ath10k: QCA988X hw2.0: update firmware-5.bin to 10.2.4-1.0-00047
ath10k: QCA9888 hw2.0: update firmware-5.bin to 10.4-3.9.0.2-00070
ath10k: QCA9887 hw1.0: update firmware-5.bin to 10.2.4-1.0-00047

Hauke

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