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

Ulf Hansson ulf.hansson at linaro.org
Wed Nov 1 07:18:59 PDT 2017

On 31 October 2017 at 19:14, Doug Anderson <dianders at chromium.org> wrote:
> Hi,
> On Tue, Oct 31, 2017 at 12:05 AM, Shawn Lin <shawn.lin at rock-chips.com> wrote:
>> Hi Ulf,
>> On 2017/10/30 19:40, Ulf Hansson wrote:
>>> On 12 October 2017 at 22:11, Douglas Anderson <dianders at chromium.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?
> Thanks for catching this and sorry for the dumb screwup.  Ulf: I'm
> happy to do do whatever makes it easiest for you.  If you want me to
> re-post it should be very quick.

I fixed it myself, by amending the commits, no worries this time!

Kind regards

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