On 06/03/2017 16:27, David Laight wrote: > Mason wrote: >> >>> So the kernel panics in xhci_find_next_ext_cap() >>> ( drivers/usb/host/xhci-ext-caps.h:122 ) >>> http://lxr.free-electrons.com/source/drivers/usb/host/xhci-ext-caps.h?v=4.9#L122 >>> >>> Any idea how this can happen? >>> >>> base = ioremap_nocache(pci_resource_start(pdev, 0), len); >>> >>> Could I be passing garbage to ioremap_nocache? >> >> Oh... >> >> I have just now understood what Ard wrote a few days ago. >> >> The issue was that, on this platform, the PCI configuration space >> and memory space are multiplexed; in other words they reside at >> the same physical address, with a bit in MMIO to choose one or >> the other. > > Time to shoot another hardware engineer. He's in CC :-) > Hopefully it isn't an SMP system - but I wouldn't put it past them. This is a dual- and quad- Cortex A9 MP platform :-( Regards. -- 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
