QCA6174-SDIO WMI Credit Exhaustion

[Adam Porter]

I'm using a fairly recent version of ath10k from kernel-backports,
along with necessary patches from the ath10k-pending-sdio-usb branch.

I have an older firmware for this card, of unknown origins, but it's
been working quite well with ath10k-sdio. ath10k reports the
abi_version of this mystery firmware to be 344. The firmware appears
to have a memory leak, so I got my hands on a newer firmware.

This new firmware is marked WLAN.RMH.4.1.1-00014-QCARMSWPZ-1, ath10k
says abi_version 467

ath10k is able to talk to this firmware, but when I try to bring up my
wlan0 interface, things start timing out due to credit exhaustion:


[   72.041885] ath10k_sdio mmc0:0001:1: htt target version 3.47
[   72.041900] ath10k_sdio mmc0:0001:1: htt h2t aggr cfg msg amsdu 3 ampdu 64
[   72.041949] ath10k_sdio mmc0:0001:1: sdio write addr 0x12f00 buf
0xffffffc01b4a5580 len 256
[   72.041957] ath10k_sdio mmc0:0001:1:
ath10k_htc_notify_tx_completion: ep 1 skb ffffffc01c1aea00
[   72.042242] ath10k_sdio mmc0:0001:1: wmi tlv pktlog disable
[   72.042293] ath10k_sdio mmc0:0001:1: sdio write addr 0x12f00 buf
0xffffffc01b4a53c0 len 256
[   72.042301] ath10k_sdio mmc0:0001:1:
ath10k_htc_notify_tx_completion: ep 1 skb ffffffc01cdee900
[   72.042316] ath10k_sdio mmc0:0001:1: htc ep 2 consumed 1 credits (total 2)
[   72.042329] ath10k_sdio mmc0:0001:1: wmi tlv pdev set param
[   72.042377] ath10k_sdio mmc0:0001:1: sdio write addr 0x1c700 buf
0xffffffc01b4a5200 len 256
[   72.042384] ath10k_sdio mmc0:0001:1:
ath10k_htc_notify_tx_completion: ep 2 skb ffffffc01c1af100
[   72.042400] ath10k_sdio mmc0:0001:1: htc ep 2 consumed 1 credits (total 1)
[   72.042411] ath10k_sdio mmc0:0001:1: wmi tlv pdev set param
[   72.042457] ath10k_sdio mmc0:0001:1: sdio write addr 0x1c700 buf
0xffffffc01b4a5040 len 256
[   72.042464] ath10k_sdio mmc0:0001:1:
ath10k_htc_notify_tx_completion: ep 2 skb ffffffc01b423b00
[   72.042479] ath10k_sdio mmc0:0001:1: htc ep 2 consumed 1 credits (total 0)
[   72.042491] ath10k_sdio mmc0:0001:1: wmi tlv adaptive qcs 1
[   72.042538] ath10k_sdio mmc0:0001:1: sdio write addr 0x1c700 buf
0xffffffc01b4a4e80 len 256
[   72.042545] ath10k_sdio mmc0:0001:1:
ath10k_htc_notify_tx_completion: ep 2 skb ffffffc01c1af100
[   72.042560] ath10k_sdio mmc0:0001:1: htc insufficient credits ep 2
required 1 available 0
[   72.042568] ath10k_sdio mmc0:0001:1: htc insufficient credits ep 2
required 1 available 0
[   75.236012] ath10k_sdio mmc0:0001:1: htc insufficient credits ep 2
required 1 available 0

I'm not sure where to begin troubleshooting this issue. Could anyone
point me in the right direction?

Thank you,
Adam