On Fri, 2010-06-18 at 00:21 +0300, Maxim Levitsky wrote: > Hi, > > These are 2 fixes for my card reader. > > > First patch fixes old issue with system hand on suspend to disk/ram with > mmc card inserted. > I updated description, and pm notification registration order. > I think this patch can an should go to 2.6.35, because it fixes long > standing and nasty regression. > > The second patch is a result of my work trying to understand why my card > reader sometimes dies on resume. > This reader has a special MMC function which steals MMC cards, and until > now had no driver. A way to disable it was found, and while it works, it > has (at least here) a side effect of killing the controller on resume > from ram/disk (and it happens often, and doesn't depend of whether card > was in slot or not during suspend). > > Fortunately it turned out that MMC part is _almost_ standard SDHCI > controller. > This patch adds support for this device to standard sdhci driver. > Unfortunately, this support still contais small hack. > It waits 1/2 of a second on resume before initializing the controller. > Not doing so, and resuming with MMC card present results in confused > controller. It is not dead though. A card reinsert makes it work again > with all cards. > Yet the 1st patch is must for this because otherwise mmc core seeing > that controller doesn't respond, removes the card, therefore hangs the > system. > It doesn't happen when I wait these 1/2 of second though. > > I think that this patch is also ok for 2.6.35, because it only adds new > functionality. > You are free to disable MMC controller using the same > CONFIG_MMC_RICOH_MMC. > > If you don't disable it though, instead of full lack of functionality > you will get full featured MMC controller. > > Best regards, > Maxim Levitsky > > > ping _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
