linux-kernel - Re: [PATCH v2 0/5] mmc: dw_mmc: Fix the CTO timer patch, plus the DTO timer

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Message-ID: <CAPDyKFqaZxGJyJRB36-K3zVK_-V637ge1S6bpiQjbfDe_5PhLw@mail.gmail.com>
Date:   Mon, 30 Oct 2017 12:40:08 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Douglas Anderson <dianders@...omium.org>,
        Jaehoon Chung <jh80.chung@...sung.com>
Cc:     Shawn Lin <shawn.lin@...k-chips.com>,
        Ziyuan Xu <xzy.xu@...k-chips.com>,
        Alexandru Stan <amstan@...omium.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        Brian Norris <briannorris@...omium.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        kernel@...il.dk,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/5] mmc: dw_mmc: Fix the CTO timer patch, plus the DTO timer

On 12 October 2017 at 22:11, Douglas Anderson <dianders@...omium.org> wrote:
> Recently we landed 03de19212ea3 ("mmc: dw_mmc: introduce timer for
> broken command transfer over scheme").  I found a bunch of problems
> with that patch, so this series attempts to solve some of them.
>
> This also fixes the DTO timer in some of the same ways even though I
> haven't personally seen problems with the DTO timer.
>
> NOTE: this series has only been lighly tested so far.  I can at least
> reproduce the need for the CTO timer on one of my devices and so I can
> confirm that part still works.  As mentioned in the 3rd patch I also
> ran the mmc_test kernel module on this and did manage to see the 3rd
> patch doing something useful.
>
> Changes in v2:
> - Removed extra "int i"
> - Fix the DTO timeout calculation new for v2
> - Cleanup the DTO timer new for v2
>
> Douglas Anderson (5):
>   mmc: dw_mmc: cancel the CTO timer after a voltage switch
>   mmc: dw_mmc: Fix the CTO timeout calculation
>   mmc: dw_mmc: Add locking to the CTO timer
>   mmc: dw_mmc: Fix the DTO timeout calculation
>   mmc: dw_mmc: Cleanup the DTO timer like the CTO one
>
>  drivers/mmc/host/dw_mmc.c | 162 +++++++++++++++++++++++++++++++++++++++++-----
>  1 file changed, 146 insertions(+), 16 deletions(-)
>

Douglas, Jaehoon,

I decided to pick patch 1->4 for fixes and the patch 5 for next, that
should help us to get them more tested, while Jaehoon is still
catching up.

I can add ack/drop patches for yet a couple of days this week.

Kind regards
Uffe