On Fri, 28 Aug 2020 at 11:35, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: > > On Fri, 28 Aug 2020 at 11:22, Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote: > > > > On Thu, 27 Aug 2020 at 17:06, Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> wrote: > > > > > > On Thu, 27 Aug 2020 at 15:42, Viresh Kumar <viresh.kumar@xxxxxxxxxx> wrote: > > > > > > > > On 27-08-20, 11:48, Arnd Bergmann wrote: > > > > > > > [ 3.680477] dev_pm_opp_put_clkname+0x30/0x58 > > > > > > > [ 3.683431] sdhci_msm_probe+0x284/0x9a0 > > > > > > > > > > dev_pm_opp_put_clkname() is part of the error handling in the > > > > > probe function, so I would deduct there are two problems: > > > > > > > > > > - something failed during the probe and the driver is trying > > > > > to unwind > > > > > - the error handling it self is buggy and tries to undo something > > > > > again that has already been undone. > > > > > > > > Right. > > > > > > > > > This points to Viresh's > > > > > d05a7238fe1c mmc: sdhci-msm: Unconditionally call dev_pm_opp_of_remove_table() > > > > > > > > I completely forgot that Ulf already pushed this patch and I was > > > > wondering on which of the OPP core changes I wrote have done this :( > > > > > > > > > Most likely this is not the entire problem but it uncovered a preexisting > > > > > bug. > > > > > > > > I think this is. > > > > > > > > Naresh: Can you please test with this diff ? > > > > > > I have applied your patch and tested but still see the reported problem. > > > > The git bisect shows that the first bad commit is, > > d05a7238fe1c mmc: sdhci-msm: Unconditionally call dev_pm_opp_of_remove_table() > > > > Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> > > Reported-by: Anders Roxell <anders.roxell@xxxxxxxxxx> > > I am not sure what version of the patch you tested. However, I have > dropped Viresh's v1 and replaced it with v2 [1]. It's available for > testing at: > > https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git next > > Can you please check if it still causes problems, then I will drop it, again. I tried to run with a kernel from your tree and I could see the same kernel panic on db410c [1]. Cheers, Anders [1] https://lkft.validation.linaro.org/scheduler/job/1717770#L1912
