27.10.2020 08:10, Viresh Kumar пишет: > On 26-10-20, 01:17, Dmitry Osipenko wrote: >> This patch fixes lockup which happens when OPP table is released if >> interconnect provider uses OPP in the icc_provider->set() callback >> and bandwidth of the ICC path is set to 0 by the ICC core when path >> is released. The icc_put() doesn't need the opp_table_lock protection, >> hence let's move it outside of the lock in order to resolve the problem. >> >> In particular this fixes tegra-devfreq driver lockup on trying to unload >> the driver module. The devfreq driver uses OPP-bandwidth API and its ICC >> provider also uses OPP for DVFS, hence they both take same opp_table_lock >> when OPP table of the devfreq is released. >> >> Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> >> --- ... > > Never make such _fixes_ part of such a big patchset. Always send them > separately. Perhaps it's not obvious from the commit description that this patch doesn't fix any known problems of the current mainline kernel and it's needed only for the new patches. > Having said that, I already have a patch with me which shall fix it for you as > well: I see that yours fix is already applied, thanks!
