On 16 November 2015 at 10:13, Cao Minh Hiep <[email protected]> wrote: > Dear Ulf Hansson, > > I am Hiep from Jinzai Solution (a Japanese Company) > We have tested PM driver on Rcar-Gen2 (Lager, Koelsch Board) at Linux v4.3. > > I would like to contact you because we found a patch that relate to a PM bug > : > > After Suspend/resume system one time, we can not suspend the system again!. > (I attach the test log file) > > The patch is show as below: > a98f1b7 PM / Domains: Fix validation of latency constraints in genpd > governor > > Tested-by: Harunaga <[email protected]> > Reported-by: Cao Minh Hiep <[email protected]> > > This problem disapeared if revert this patch. > Please review it, when you have time!
Thanks for reporting and bisecting! I had a look and I believe have found the cause of the problem, though I will need a few days to post a fix for it. The problem is actually in genpd's ->runtime_suspend() callback, as it validates PM QoS latencies even when it's being invoked from the system PM path. I will post a fixup to genpd in the next couple of days. I would appreciate if you could help out in testing it. Kind regards Uffe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
