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: <da14d1a3-c85f-b415-1cb6-b5d1f3a1ed7a@rock-chips.com>
Date:   Tue, 31 Oct 2017 15:05:20 +0800
From:   Shawn Lin <shawn.lin@...k-chips.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Douglas Anderson <dianders@...omium.org>
Cc:     Jaehoon Chung <jh80.chung@...sung.com>, 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

Hi Ulf,

On 2017/10/30 19:40, Ulf Hansson wrote:
> 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.

Patch 4 introduce a warning:

warning: unused variable ‘irqflags’ [-Wunused-variable]

irqflags should be introduced in patch 5 in the same place.
As it seems patch 5 will be candidate for 4.15, so could you please
help fix patch 4 and 5 manually? Or Doug need to resend patch 4 and 5?



> 
> Kind regards
> Uffe
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