[Added Mathias to CC: list] On Sat, 7 Jun 2014, Benjamin Herrenschmidt wrote: > I'm trying to kexec from our OPAL FW bootloader (3.10.23 based) to a > fedora 3.14.3 on a new machine and am still seeing the above. > > A reset brings the chip back. > > Do we have any resolution here ? It looks like the xHCI remains active > on the way out and is clagged up on the way back in, at least in a > state the driver really doesn't like. > > And this is a "clean" kexec, not a forced one... This is killing USB on > the upcoming OpenPower dev machines. The current xhci-hcd driver includes a quirk flag (XHCI_SPURIOS_WAKEUP) that causes the shutdown routine to reset the controller. It wasn't meant for fixing kexec problems, but I bet you could use it for that purpose. In addition, it's possible that a reset is needed in the probe pathway. 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
