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

Shawn Lin shawn.lin at rock-chips.com
Tue Oct 31 00:05:20 PDT 2017

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?

> Kind regards
> Uffe
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