[PATCH] ath10k: Clean the HI_ACS_FLAGS_ALT_DATA_CREDIT_SIZE flag

[Kalle Valo]

Fabio Estevam <festevam at gmail.com> writes:

> Hi Kalle,
>
> On Mon, Nov 15, 2021 at 3:06 PM Fabio Estevam <festevam at gmail.com> wrote:
>>
>> Hi Kalle,
>>
>> On Wed, Sep 15, 2021 at 1:05 PM Fabio Estevam <festevam at denx.de> wrote:
>> >
>> > On an imx6dl-pico-pi board with a QCA9377 SDIO chip, the following
>> > errors are observed when the board works in STA mode:
>> >
>> > Simply running "ssh user at 192.168.0.1" causes:
>> >
>> > [   55.824159] ath10k_sdio mmc1:0001:1: failed to transmit packet, dropping: -12
>> > [   55.832169] ath10k_sdio mmc1:0001:1: failed to submit frame: -12
>> > [   55.838529] ath10k_sdio mmc1:0001:1: failed to push frame: -12
>> > [   55.905863] ath10k_sdio mmc1:0001:1: failed to transmit packet, dropping: -12
>> > [   55.913650] ath10k_sdio mmc1:0001:1: failed to submit frame: -12
>> > [   55.919887] ath10k_sdio mmc1:0001:1: failed to push frame: -12
>> >
>> > and it is not possible to connect via ssh to the other machine.
>> >
>> > One user inspected the size of frames on Wireshark and reported
>> > the followig:
>> >
>> > "I was able to narrow the issue down to the mtu. If I set the mtu for
>> > the wlan0 device to 1486 instead of 1500, the issue does not happen.
>> >
>> > The size of frames that I see on Wireshark is exactly 1500 after
>> > setting it to 1486."
>> >
>> > Clearing the HI_ACS_FLAGS_ALT_DATA_CREDIT_SIZE avoids the problem and
>> > the ssh command works successfully after that.
>> >
>> > Tested with QCA9377 SDIO with firmware WLAN.TF.1.1.1-00061-QCATFSWPZ-1.
>> >
>> > Fixes: 2f918ea98606 ("ath10k: enable alt data of TX path for sdio")
>> > Signed-off-by: Fabio Estevam <festevam at denx.de>
>>
>> A gentle ping on this one.
>
> Any comments, please? Without this fix, we can not log via ssh to other machine.

I don't have much time for ath10k nowadays, so expect long delays in
reviews.

I'm worried that this breaks QCA6174 SDIO support. Wen, what do you
think of this? Is this because of differences between firmware versions
or what?

-- 
https://patchwork.kernel.org/project/linux-wireless/list/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches