• Eric W. Biederman's avatar
    PCI: Simplify hotplug mch quirk. · 0ba379ec
    Eric W. Biederman authored
    There is a very old quirk for the intel E7502 E7320 and E7525 memory
    controller hubs that disables usage of msi interrupts on pcie hotplug
    bridges of those devices, and disables changing the affinity of irqs.
    
    Today all we have to do to disable msi on a specific device is to set
    dev->no_msi, which is much more straightforward than the previous
    logic.
    
    The re-running of this fixup after pci hotplug happens below these
    devices is totally bogus.  All of the state we change is pure software
    state and we don't change the hardware at all.  Which means hotplug on
    the lower devices doesn't have a chance to change this state.  So we
    can safely remove the special case from the pciehp driver and the pcie
    portdriver.
    
    I suspect the special case was someone's expermental debug code that
    slipped in. Certainly it isn't mentioned in commit
    6fb8880a61510295aece04a542767161f624dffe aka BKrev:
    41966101LJ_ogfOU0m2aE6teZfQnuQ where the code first appears.
    Reviewed-by: default avatarKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
    Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
    Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
    0ba379ec
pciehp_pci.c 8.21 KB