• Bjorn Helgaas's avatar
    smsc-ircc2: skip preconfiguration for PNP devices · 7c31d2f5
    Bjorn Helgaas authored
    
    
    If we rely on the device resources from PNPBIOS, we also have to rely on
    the BIOS to configure any bridges on the way to the device.
    
    Using the PNPBIOS resources but changing the configuration of a bridge
    behind the back of the firmware is likely to make things inconsistent.
    
    This patch addresses part of the 2.6.22 regression:
        "no irda0 interface (2.6.21 was OK), smsc does not find chip"
    It fixes smsc-ircc2 PNP device detection on HP nx5000 laptops.
    Other laptops, including HP nc6000, HP nc8000, HP nw8000, and Toshiba
    Portege 4000, still need PNP quirks to make this work.
    
    With "smsc-ircc2.nopnp", we do the legacy device probe, including manual
    bridge preconfiguration, as before.
    
    Signed-off-by: default avatarBjorn Helgaas <bjorn.helgaas@hp.com>
    Cc: Samuel Ortiz <samuel@sortiz.org>
    Acked-by: default avatar"Linus Walleij (LD/EAB)" <linus.walleij@ericsson.com>
    Cc: Andrey Borzenkov <arvidjaar@mail.ru>
    Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
    Cc: "David S. Miller" <davem@davemloft.net>
    Cc: Adam Belay <ambx1@neo.rr.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    7c31d2f5