Hi all， If no pci, the PCI I/O space(16M) is mapped into an irrelevant mem space(right ?), not a right IO space, that is, no one call pci_remap_iospace() to remap the memory mapped I/O space, once driver like f71805f loaded, write value to IO space(see f71805f_init->f71805f_find->superio_enter->outb), we met following oops, ------------------------ Unable to handle kernel paging request at virtual address ffffffbffee0002e pgd = ffffffc1d68d4000 [ffffffbffee0002e] *pgd=0000000000000000, *pud=0000000000000000 Internal error: Oops: 94000046 [#1] PREEMPT SMP Modules linked in: f71805f(+) hwmon CPU: 3 PID: 1659 Comm: insmod Not tainted 4.5.0+ #88 Hardware name: linux,dummy-virt (DT) task: ffffffc1f6665400 ti: ffffffc1d6418000 task.ti: ffffffc1d6418000 PC is at f71805f_find+0x6c/0x358 [f71805f] ------------------------ I am not clear about PCI I/O, but if this is indeed a bug, how to solve this issue, any advice will be appreciated. Thanks Kefeng -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
