From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD6F1ECE58E for ; Tue, 8 Oct 2019 11:49:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8E27720679 for ; Tue, 8 Oct 2019 11:49:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="fiKEYopP" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730674AbfJHLto (ORCPT ); Tue, 8 Oct 2019 07:49:44 -0400 Received: from mail-vs1-f67.google.com ([209.85.217.67]:41701 "EHLO mail-vs1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730608AbfJHLtn (ORCPT ); Tue, 8 Oct 2019 07:49:43 -0400 Received: by mail-vs1-f67.google.com with SMTP id l2so11064565vsr.8 for ; Tue, 08 Oct 2019 04:49:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=gashf1ZAzd7Key4/NTgvhc64QRBwluBpWB6I3jCKxOs=; b=fiKEYopPXYm6rnp9NjGkZ1KcxJYHZsxjBsMcc4hv/5OjHpyX6k5WIZm5dG9fad39cl Xtf1v1I9/muc4vBfWDoHarMolIog9R7edzArMf/o2czUC+w50R5TMNqP3rzykMDI+E2t jnjKDrirhh3DlISSyuneGArhMkA2RopW8++mtlSmrDMvtMFAzq9nh1UcDtrWzpFldPSp 21K/vLD74zrdAEg567mSi9sOZcJWbTBZK/S+CBLwbF26h+hAilx7tORo5YQ8GMwtXwpf CfMcWqI2vDL/JiCrV2asdoqPcJOctLMLTRciRj0d9PNZtHT3HwjFlBCRWjkFcBA1eH1+ Qs5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=gashf1ZAzd7Key4/NTgvhc64QRBwluBpWB6I3jCKxOs=; b=eumvtQKKE96ffG4Rrrv56g6VZ3Ix9hNZQq8zPFz+TdluZ5kKug9fmK2Eho3IEZmk2+ eodP6+hdr6aT5yjd6p1zAl3xHIq1gg0+HKxGRuHRMuUny3JK/KE/DiBlem7Pdlu63ycq DuxLmFZXbf979T6uJWj9RtxIinPH1Th651HVBTQjvi6LPToAyugWDtfaDnMunUcsHt+z zlawRv/Mj0BQXjXvk2QLbOM6A48Y0Xc5aOUfr9vJvmU047y7PdHIqcVFgrJlCq2f2Z2c audurfNNx71KM14hoFvLAMUHG3w6q5RG1ORrRN/zpfSGqozL9ZDzGSDGoU4eAkHtMJUQ 7lIw== X-Gm-Message-State: APjAAAX23nPgx2mDfEyZrqk9GZw45OfmFWj0jjn3HlmoUNwraR9SVfSl DcyLZInAWgJO1uNPwwat4UFBQl/BVVV4dqPXpOY15Q== X-Google-Smtp-Source: APXvYqx1S5aRGmUgzD93NIsrCsojrRb50hnb1dlLYGdT6Yjq5noW1W3AgzaTaEm3MSleilsKWehRv1NgQwfNWVYKRbE= X-Received: by 2002:a67:eb84:: with SMTP id e4mr17918307vso.165.1570535380644; Tue, 08 Oct 2019 04:49:40 -0700 (PDT) MIME-Version: 1.0 References: <20190722193939.125578-1-dianders@chromium.org> In-Reply-To: From: Ulf Hansson Date: Tue, 8 Oct 2019 13:49:04 +0200 Message-ID: Subject: Re: [PATCH v2 0/2] mmc: core: Fix Marvell WiFi reset by adding SDIO API to replug card To: Doug Anderson Cc: Kalle Valo , Adrian Hunter , Ganapathi Bhat , linux-wireless , Andreas Fenkart , Brian Norris , Amitkumar Karwar , "open list:ARM/Rockchip SoC..." , Wolfram Sang , Nishant Sarmukadam , netdev , Avri Altman , "linux-mmc@vger.kernel.org" , "David S. Miller" , Xinming Hu , Linux Kernel Mailing List , Thomas Gleixner , Kate Stewart Content-Type: text/plain; charset="UTF-8" Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On Tue, 8 Oct 2019 at 01:39, Doug Anderson wrote: > > Hi, > > On Mon, Sep 16, 2019 at 2:25 AM Ulf Hansson wrote: > > > > On Wed, 11 Sep 2019 at 23:26, Doug Anderson wrote: > > > > > > Hi, > > > > > > On Thu, Jul 25, 2019 at 6:28 AM Ulf Hansson wrote: > > > > > > > > On Mon, 22 Jul 2019 at 21:41, Douglas Anderson wrote: > > > > > > > > > > As talked about in the thread at: > > > > > > > > > > http://lkml.kernel.org/r/CAD=FV=X7P2F1k_zwHc0mbtfk55-rucTz_GoDH=PL6zWqKYcpuw@mail.gmail.com > > > > > > > > > > ...when the Marvell WiFi card tries to reset itself it kills > > > > > Bluetooth. It was observed that we could re-init the card properly by > > > > > unbinding / rebinding the host controller. It was also observed that > > > > > in the downstream Chrome OS codebase the solution used was > > > > > mmc_remove_host() / mmc_add_host(), which is similar to the solution > > > > > in this series. > > > > > > > > > > So far I've only done testing of this series using the reset test > > > > > source that can be simulated via sysfs. Specifically I ran this test: > > > > > > > > > > for i in $(seq 1000); do > > > > > echo "LOOP $i --------" > > > > > echo 1 > /sys/kernel/debug/mwifiex/mlan0/reset > > > > > > > > > > while true; do > > > > > if ! ping -w15 -c1 "${GW}" >/dev/null 2>&1; then > > > > > fail=$(( fail + 1 )) > > > > > echo "Fail WiFi ${fail}" > > > > > if [[ ${fail} == 3 ]]; then > > > > > exit 1 > > > > > fi > > > > > else > > > > > fail=0 > > > > > break > > > > > fi > > > > > done > > > > > > > > > > hciconfig hci0 down > > > > > sleep 1 > > > > > if ! hciconfig hci0 up; then > > > > > echo "Fail BT" > > > > > exit 1 > > > > > fi > > > > > done > > > > > > > > > > I ran this several times and got several hundred iterations each > > > > > before a failure. When I saw failures: > > > > > > > > > > * Once I saw a "Fail BT"; manually resetting the card again fixed it. > > > > > I didn't give it time to see if it would have detected this > > > > > automatically. > > > > > * Once I saw the ping fail because (for some reason) my device only > > > > > got an IPv6 address from my router and the IPv4 ping failed. I > > > > > changed my script to use 'ping6' to see if that would help. > > > > > * Once I saw the ping fail because the higher level network stack > > > > > ("shill" in my case) seemed to crash. A few minutes later the > > > > > system recovered itself automatically. https://crbug.com/984593 if > > > > > you want more details. > > > > > * Sometimes while I was testing I saw "Fail WiFi 1" indicating a > > > > > transitory failure. Usually this was an association failure, but in > > > > > one case I saw the device do "Firmware wakeup failed" after I > > > > > triggered the reset. This caused the driver to trigger a re-reset > > > > > of itself which eventually recovered things. This was good because > > > > > it was an actual test of the normal reset flow (not the one > > > > > triggered via sysfs). > > > > > > > > > > Changes in v2: > > > > > - s/routnine/routine (Brian Norris, Matthias Kaehlcke). > > > > > - s/contining/containing (Matthias Kaehlcke). > > > > > - Add Matthias Reviewed-by tag. > > > > > - Removed clear_bit() calls and old comment (Brian Norris). > > > > > - Explicit CC of Andreas Fenkart. > > > > > - Explicit CC of Brian Norris. > > > > > - Add "Fixes" pointing at the commit Brian talked about. > > > > > - Add Brian's Reviewed-by tag. > > > > > > > > > > Douglas Anderson (2): > > > > > mmc: core: Add sdio_trigger_replug() API > > > > > mwifiex: Make use of the new sdio_trigger_replug() API to reset > > > > > > > > > > drivers/mmc/core/core.c | 28 +++++++++++++++++++-- > > > > > drivers/mmc/core/sdio_io.c | 20 +++++++++++++++ > > > > > drivers/net/wireless/marvell/mwifiex/sdio.c | 16 +----------- > > > > > include/linux/mmc/host.h | 15 ++++++++++- > > > > > include/linux/mmc/sdio_func.h | 2 ++ > > > > > 5 files changed, 63 insertions(+), 18 deletions(-) > > > > > > > > > > > > > Doug, thanks for sending this! > > > > > > > > As you know, I have been working on additional changes for SDIO > > > > suspend/resume (still WIP and not ready for sharing) and this series > > > > is related. > > > > > > > > The thing is, that even during system suspend/resume, synchronizations > > > > are needed between the different layers (mmc host, mmc core and > > > > sdio-funcs), which is common to the problem you want to solve. > > > > > > > > That said, I need to scratch my head a bit more before I can provide > > > > you some feedback on $subject series. Moreover, it's vacation period > > > > at my side so things are moving a bit slower. Please be patient. > > > > > > I had kinda forgotten about this series after we landed it locally in > > > Chrome OS, but I realized that it never got resolved upstream. Any > > > chance your head has been sufficiently scratched and you're now happy > > > with $subject series? ;-) > > > > It's still on my TODO list. Apologize for the delay, but I still need > > more time to look into it, possibly later this week. > > > > In any case, let's make sure we get this problem resolved for v5.5. > > Hi Ulf. It's your friendly pest, Doug, here to ask how things are going. :-P :-) The series on the top of my "things to review" list. I will definitely provide you with some feedback then next days or so. Again, sorry for the delay! Kind regards Uffe