[PATCH] Revert "mmc: disable UHS modes if Vcc cannot be switched on and off"

[Pali Rohár]

On Tuesday 11 August 2020 08:39:24 Faiz Abbas wrote:
> Pali, Peng,
> 
> On 10/08/20 6:25 am, Peng Fan wrote:
> > Faiz, Jean
> > 
> >> Subject: [PATCH] Revert "mmc: disable UHS modes if Vcc cannot be switched
> >> on and off"
> > 
> > Got time to take a look?
> > 
> 
> When this issue was reported in the last thread, Pali said that he was unable to get
> prints because of the constant reboot loops? Shouldn't it be easy to put while(1)
> at different points in this execution and see which step causes the reboot loop?

In May in that last thread I wrote details which I was able to gather:

    Month ago I was able to detect that problem is somewhere in function
    mmc_set_ios() from mmc.c file. I put long debug line prior and also
    after mmc_set_ios() call. And it was printed only prior. Not after.
    So I think NULL pointer dereference is in mmc_set_ios() function.

I could try with that while(1) loop to print detailed log message and
read/capture it. But what information for debugging you need? Or what do
you want to print which could help you?