On Thu, 3 Jun 2010, Maxim Levitsky wrote: > I have a card reader on which one function implements SDHCI and other > MMC (to workaround windows bug....) > > There is a way to disable MMC function, but is causes the device > sometimes to die on resume from disk/ram. > > I today was told that MMC function is in fact _almost_ standard SDHCI > controller, and in fact now sdhci binds to it and works just fine. > > However since both devices share same hardware they appear to have need > to be resumed one after another, and definitely not in parallel. > I tried to use device_disable_async_suspend on both pci devices and > indeed both power/async turns to false. > > But they are still resumed in parallel: > (look how well mmc0 and mmc1 interleave...) > Why? My guess is that you shouldn't have disabled async suspend on the PCI devices but on their children instead. That is, the PCI devices are 0000:07:00.1 and 0000:07:00.2, but the devices causing your problem are mmc0 and mmc1. Or maybe you'd prefer to disable async suspend on all four devices. Alan Stern _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
