On Wed, 11 Sep 2013, Paul Zimmerman wrote: > > From: linux-usb-owner@xxxxxxxxxxxxxxx [mailto:linux-usb-owner@xxxxxxxxxxxxxxx] 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. Ah, so it does. Thanks for the pointer. Okay, I have no more objections to this patch. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
