• Ivan Kokshaysky's avatar
    [PATCH] x86: pci_assign_unassigned_resources() update · 81d4af13
    Ivan Kokshaysky authored
    I had some time to think about PCI assign issues in 2.6.13-rc series.
    
    The major problem here is that we call pci_assign_unassigned_resources()
    way too early - at subsys_initcall level. Therefore we give no chances
    to ACPI and PnP routines (called at fs_initcall level) to reserve their
    respective resources properly, as the comments in drivers/pnp/system.c
    and drivers/acpi/motherboard.c suggest:
    
     /**
      * Reserve motherboard resources after PCI claim BARs,
      * but before PCI assign resources for uninitialized PCI devices
      */
    
    So I moved the pci_assign_unassigned_resources() call to
    pcibios_assign_resources() (fs_initcall), which should hopefully fix a
    lot of problems and make PCIBIOS_MIN_IO tweaks unnecessary.
    
    Other changes:
    - remove resource assignment code from pcibios_assign_resources(), since
      it duplicates pci_assign_unassigned_resources() functionality and
      actually does nothing in 2.6.13;
    - modify ROM assignment code as per Ben's suggestion: try to use firmware
      settings by default (if PCI_ASSIGN_ROMS is not set);
    - set CARDBUS_IO_SIZE back to 4K as it's a wonderful stress test for
      various setups.
    
    Confirmed by Tero Roponen <teanropo@cc.jyu.fi> (who had problems with
    the 4kB CardBus IO size previously).
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    81d4af13
i386.c 8.47 KB