> > On Fri, 5 Mar 2010, Libin wrote: > > > > > I thought the USB core ensured that all devices were suspended > before > > > > suspending the root hub. Alan, can you confirm? > > > > > > It does not ensure this if CONFIG_USB_SUSPEND isn't enabled. In such > > > cases it never suspends any ports, but it still calls the HCDs' > > > bus_suspend routines if CONFIG_PM is set. > > > > So does this mean that if CONFIG_USB_SUSPEND isn't enabled, > > bus_suspend() can straight skip the port suspend and return? Or > > bus_suspend() needs suspend the ports? > > Even if CONFIG_USB_SUSPEND is defined, ports still won't always be > suspended before bus_suspend() runs. This will happen during the > FREEZE and PRETHAW phases of hibernation. > > In fact, during FREEZE and PRETHAW it isn't really necessary to suspend > the xHCI controller. All that is needed is to make sure that it stops > issuing interrupts and doing DMA. > > > BTW: Is Greg's git address: > > > > git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6.git > > I don't think so; the summary for that repository says "junk tree, > please ignore". The last time I checked, Greg's work was not > available in a git repository. You have to look at the most recent > patch files in: > > http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/ > > Right now that would be gregkh-07-usb-2.6.33.patch or > gregkh-all-2.6.33.patch. Got it. Thanks, Libin -- 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
