> From: [email protected] > [mailto:[email protected]] On Behalf Of Alan Stern > Sent: Wednesday, September 11, 2013 9:30 AM > > On Wed, 11 Sep 2013, Takashi Iwai wrote: > > > Reloading xhci-hcd module works no matter whether CONFIG_PM_RUNTIME=y > > or not. (And yes, the device went to D3 at unload and to D0 at load, > > as long as looking at lspci output.) > > Interesting. I thought there wasn't any code in the PCI core for > putting devices back into D0 before probing. The idea is that during > unbinding, the device should get set to D0 and should remain there. > But with your patch, obviously that's not what happens. > > Something else must also be setting the device back to D0. Do you have > any idea what? It's not xhci-hcd.
pci_enable_device() called from usb_hcd_pci_probe() does that. -- Paul -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
