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From:   Fabio Estevam <festevam@gmail.com>
Date:   Wed, 24 Nov 2021 00:26:32 -0300
Message-ID: <CAOMZO5AJ8q06YTHP=p84nJnKOYU+=MKVqJ3qz3XnUGcAg0xo=g@mail.gmail.com>
Subject: Re: [PATCH] ath10k: Clean the HI_ACS_FLAGS_ALT_DATA_CREDIT_SIZE flag
To:     Kalle Valo <kvalo@codeaurora.org>
Cc:     Fabio Estevam <festevam@denx.de>, wgong@codeaurora.org,
        ath10k@lists.infradead.org,
        linux-wireless <linux-wireless@vger.kernel.org>,
        erik.stromdahl@gmail.com, alagusankar@silex-india.com
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Hi Kalle,

On Mon, Nov 15, 2021 at 3:06 PM Fabio Estevam <festevam@gmail.com> wrote:
>
> Hi Kalle,
>
> On Wed, Sep 15, 2021 at 1:05 PM Fabio Estevam <festevam@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@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@denx.de>
>
> A gentle ping on this one.

Any comments, please? Without this fix, we can not log via ssh to other machine.