Pali, On 11/08/20 1:19 pm, Pali Rohár wrote: > 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? >
You can continue to bisect into omap_hsmmc_set_ios() to see at what point the NULL pointer gets triggered and what the NULL pointer is. Also can you point to your config file? Thanks, Faiz
