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Fri, 28 Aug 2020 06:29:34 -0400 Received: from mail-lf1-x143.google.com (mail-lf1-x143.google.com [IPv6:2a00:1450:4864:20::143]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 961D4C061264 for ; Fri, 28 Aug 2020 03:29:33 -0700 (PDT) Received: by mail-lf1-x143.google.com with SMTP id c15so449118lfi.3 for ; Fri, 28 Aug 2020 03:29:33 -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=QVZYq2PBPO60+hzu+DH/FiN1wZH0KS7M3eptGgjOhVE=; b=COZoZdwmI7PziLKiORCTiWJDGnCuoz7Y3bWHJ2oAICLzYBX2r0BR8efZez4ilASG1W kaYUjOIqVzFdQRCfzuQOH6fo3FlcWH2L1WW8wrUCtoSXi4L8H75fgRt9SgIwy0u0sHyg jE5+7xEi52Qf7F6bYe2vYA/sfnrl/iTTe16xU1v8qkv6ji0lXChDS9fqWadnRxJg5Wwx PvND1ssAKs/wDsIp3Kb+krUb5LvrIpMfKX7O3xyfFrFYv54LFh1IUsawP9sk1gXbsKDW IbK90giBWIXG0N+/DsisILRpLosibuaxOR10V5YHH6QlODOfxldsZKWTguOEG0DSIirV qr2Q== 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=QVZYq2PBPO60+hzu+DH/FiN1wZH0KS7M3eptGgjOhVE=; b=Rl4GzW/DvF6Pztox4XfNxGjePfHGjSW6ROKlIynV0ZBeUH2ExsGNk90aKAqxQ/gx9m EZdgF/G9t35nR8rXvhT5ZJJ7Iblz07fswpgt3jyuzIHdEZtxeZSMUz3Br5V8RW/8u2/R UXJV/LBAoLO+2DUAMFdihEw5+XlXsg1qBgeN+cYlfhXxaVJt7hKQX9Bor0Y/SHffCiA1 WyIU4gfTXEDBy9MZBuEQaONr0bVVadnwBJcvEblAlG+5Sq+sJhlZV2pmVEZius78yT45 5ljbTTj4nqv3Gxw18gKY/OPczrRB2i7IOL2ss4JwCwgGm/vW8o1OVmaeZkaEG8pDPurv Hjaw== X-Gm-Message-State: AOAM533L1N1u1Px4qEeFubMSNG0Zun4lCRXGgYCL4DjKwxkV+Y+FLcYQ USN/RXVkFHD8nZzVgKqxkWZsoaLPh74oQdgRCbkXnQ== X-Google-Smtp-Source: ABdhPJz+qwt3X7HgwHyJ4lpLawfdxGagKrMWAvsaV5ZAG+gYUecbHreIkxf2KT8piK7zCbe9pYFyRHUfVwV16+Iet6Q= X-Received: by 2002:ac2:58c6:: with SMTP id u6mr481701lfo.105.1598610571828; Fri, 28 Aug 2020 03:29:31 -0700 (PDT) MIME-Version: 1.0 References: <20200827090813.fjugeqbb47fachy7@vireshk-i7> <20200827101231.smqrhqu5da6jlz6i@vireshk-i7> In-Reply-To: From: Anders Roxell Date: Fri, 28 Aug 2020 12:29:20 +0200 Message-ID: Subject: Re: Kernel panic : Unable to handle kernel paging request at virtual address - dead address between user and kernel address ranges To: Ulf Hansson Cc: Naresh Kamboju , Viresh Kumar , Stephen Rothwell , Arnd Bergmann , Rajendra Nayak , open list , Linux-Next Mailing List , linux-clk , linux-mmc , lkft-triage@lists.linaro.org, John Stultz , Daniel Lezcano , Michael Turquette , Stephen Boyd , Lars Povlsen , madhuparnabhowmik10@gmail.com Content-Type: text/plain; charset="UTF-8" Sender: linux-next-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org On Fri, 28 Aug 2020 at 11:35, Ulf Hansson wrote: > > On Fri, 28 Aug 2020 at 11:22, Naresh Kamboju wrote: > > > > On Thu, 27 Aug 2020 at 17:06, Naresh Kamboju wrote: > > > > > > On Thu, 27 Aug 2020 at 15:42, Viresh Kumar wrote: > > > > > > > > On 27-08-20, 11:48, Arnd Bergmann wrote: > > > > > > > [ 3.680477] dev_pm_opp_put_clkname+0x30/0x58 > > > > > > > [ 3.683431] sdhci_msm_probe+0x284/0x9a0 > > > > > > > > > > dev_pm_opp_put_clkname() is part of the error handling in the > > > > > probe function, so I would deduct there are two problems: > > > > > > > > > > - something failed during the probe and the driver is trying > > > > > to unwind > > > > > - the error handling it self is buggy and tries to undo something > > > > > again that has already been undone. > > > > > > > > Right. > > > > > > > > > This points to Viresh's > > > > > d05a7238fe1c mmc: sdhci-msm: Unconditionally call dev_pm_opp_of_remove_table() > > > > > > > > I completely forgot that Ulf already pushed this patch and I was > > > > wondering on which of the OPP core changes I wrote have done this :( > > > > > > > > > Most likely this is not the entire problem but it uncovered a preexisting > > > > > bug. > > > > > > > > I think this is. > > > > > > > > Naresh: Can you please test with this diff ? > > > > > > I have applied your patch and tested but still see the reported problem. > > > > The git bisect shows that the first bad commit is, > > d05a7238fe1c mmc: sdhci-msm: Unconditionally call dev_pm_opp_of_remove_table() > > > > Reported-by: Naresh Kamboju > > Reported-by: Anders Roxell > > I am not sure what version of the patch you tested. However, I have > dropped Viresh's v1 and replaced it with v2 [1]. It's available for > testing at: > > https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git next > > Can you please check if it still causes problems, then I will drop it, again. I tried to run with a kernel from your tree and I could see the same kernel panic on db410c [1]. Cheers, Anders [1] https://lkft.validation.linaro.org/scheduler/job/1717770#L1912