netdev - Re: [PATCH 1/3] brcmfmac: re-enable command decode in sdio

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Message-ID: <16aff358a20.2764.9b12b7fc0a3841636cfb5e919b41b954@broadcom.com>
Date:   Tue, 28 May 2019 18:11:00 +0200
From:   Arend Van Spriel <arend.vanspriel@...adcom.com>
To:     Doug Anderson <dianders@...omium.org>,
        Kalle Valo <kvalo@...eaurora.org>
CC:     Madhan Mohan R <MadhanMohan.R@...ress.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        "Chi-Hsien Lin" <chi-hsien.lin@...ress.com>,
        Brian Norris <briannorris@...omium.org>,
        "linux-wireless" <linux-wireless@...r.kernel.org>,
        YueHaibing <yuehaibing@...wei.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        <brcm80211-dev-list.pdl@...adcom.com>,
        Matthias Kaehlcke <mka@...omium.org>,
        Naveen Gupta <naveen.gupta@...ress.com>,
        Wright Feng <wright.feng@...ress.com>,
        <brcm80211-dev-list@...ress.com>,
        Double Lo <double.lo@...ress.com>,
        Franky Lin <franky.lin@...adcom.com>
Subject: Re: [PATCH 1/3] brcmfmac: re-enable command decode in sdio_aos for BRCM 4354

On May 28, 2019 6:09:21 PM Arend Van Spriel <arend.vanspriel@...adcom.com> 
wrote:

> On May 28, 2019 5:52:10 PM Doug Anderson <dianders@...omium.org> wrote:
>
>> Hi,
>>
>> On Tue, May 28, 2019 at 5:18 AM Kalle Valo <kvalo@...eaurora.org> wrote:
>>>
>>> Douglas Anderson <dianders@...omium.org> wrote:
>>>
>>> > In commit 29f6589140a1 ("brcmfmac: disable command decode in
>>> > sdio_aos") we disabled something called "command decode in sdio_aos"
>>> > for a whole bunch of Broadcom SDIO WiFi parts.
>>> >
>>> > After that patch landed I find that my kernel log on
>>> > rk3288-veyron-minnie and rk3288-veyron-speedy is filled with:
>>> >   brcmfmac: brcmf_sdio_bus_sleep: error while changing bus sleep state -110
>>> >
>>> > This seems to happen every time the Broadcom WiFi transitions out of
>>> > sleep mode.  Reverting the part of the commit that affects the WiFi on
>>> > my boards fixes the problem for me, so that's what this patch does.
>>> >
>>> > Note that, in general, the justification in the original commit seemed
>>> > a little weak.  It looked like someone was testing on a SD card
>>> > controller that would sometimes die if there were CRC errors on the
>>> > bus.  This used to happen back in early days of dw_mmc (the controller
>>> > on my boards), but we fixed it.  Disabling a feature on all boards
>>> > just because one SD card controller is broken seems bad.  ...so
>>> > instead of just this patch possibly the right thing to do is to fully
>>> > revert the original commit.
>>> >
>>> > Fixes: 29f6589140a1 ("brcmfmac: disable command decode in sdio_aos")
>>> > Signed-off-by: Douglas Anderson <dianders@...omium.org>
>>>
>>> I don't see patch 2 in patchwork and I assume discussion continues.
>>
>> Apologies.  I made sure to CC you individually on all the patches but
>> didn't think about the fact that you use patchwork to manage and so
>> didn't ensure all patches made it to all lists (by default each patch
>> gets recipients individually from get_maintainer).  I'll make sure to
>> fix for patch set #2.  If you want to see all the patches, you can at
>> least find them on lore.kernel.org linked from the cover:
>>
>> https://lore.kernel.org/patchwork/cover/1075373/
>>
>>
>>> Please resend if/when I need to apply something.
>>>
>>> 2 patches set to Changes Requested.
>>>
>>> 10948785 [1/3] brcmfmac: re-enable command decode in sdio_aos for BRCM 4354
>>
>> As per Arend I'll change patch #1 to a full revert instead of a
>> partial revert.  Arend: please yell if you want otherwise.
>
> No yelling here. If any it is expected from Cypress. Maybe good to add them
> specifically in Cc:

Of the revert patch that is.

Gr. AvS