On Mon, Jul 04, 2016 at 06:04:42PM +0300, Mathias Nyman wrote: > On 04.07.2016 17:25, Rafael J. Wysocki wrote: > > On Mon, Jul 4, 2016 at 4:26 PM, Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx> wrote: > > > AceLan Kao can get his DELL XPS 13 laptop to hang by plugging/un-plugging > > > a USB 3.1 key via thunderbolt port. > > > > > > Allocating memory fails after this, always pointing to NULL pointer or > > > page request failing in get_freepointer() called by > > > kmalloc/kmem_cache_alloc. > > > > > > Unplugging a usb type-c device from the thunderbolt port on Alpine Ridge > > > based systems like this one will hotplug remove PCI bridges together > > > with the USB xhci controller behind them. Yes, that matches with the lspci output you've posted, the whole Thunderbolt controller is gone after unplug. Perhaps it's powered down? What does "lspci -vvvv -s 00:1d.6" say? (Does the root port still have a link to the Thunderbolt controller?) Best regards, Lukas -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>