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    Subject[04/34] comedi: Uncripple 8255-based DIO subdevices
    2.6.32-stable review patch.  If anyone has any objections, please let us know.


    (Note: upstream comedi configuration has been overhauled, so this patch
    does not apply there.)

    Several comedi drivers call subdev_8255_init() (declared in
    "drivers/staging/comedi/drivers/8255.h") to set up one or more DIO
    subdevices. This should be provided by the 8255.ko module, but unless
    the CONFIG_COMEDI_8255 or CONFIG_COMEDI_8255_MODULE macro is defined,
    the 8255.h header uses a dummy inline version of the function instead.
    This means the comedi devices end up with an "unused" subdevice with 0
    channels instead of a "DIO" subdevice with 24 channels!

    This patch provides a non-interactive COMEDI_8255 option and selects it
    whenever the COMEDI_PCI_DRIVERS or COMEDI_PCMCIA_DRIVERS options are

    Signed-off-by: Ian Abbott <>
    Signed-off-by: Greg Kroah-Hartman <>

    drivers/staging/comedi/Kconfig | 5 +++++
    drivers/staging/comedi/drivers/Makefile | 4 +++-
    2 files changed, 8 insertions(+), 1 deletion(-)

    --- a/drivers/staging/comedi/Kconfig
    +++ b/drivers/staging/comedi/Kconfig
    @@ -16,6 +16,7 @@ config COMEDI_DEBUG
    tristate "Comedi PCI drivers"
    depends on COMEDI && PCI
    + select COMEDI_8255
    default N
    Enable lots of comedi PCI drivers to be built
    @@ -23,6 +24,7 @@ config COMEDI_PCI_DRIVERS
    tristate "Comedi PCMCIA drivers"
    depends on COMEDI && PCMCIA && PCCARD
    + select COMEDI_8255
    default N
    Enable lots of comedi PCMCIA and PCCARD drivers to be built
    @@ -33,3 +35,6 @@ config COMEDI_USB_DRIVERS
    default N
    Enable lots of comedi USB drivers to be built
    +config COMEDI_8255
    + tristate
    --- a/drivers/staging/comedi/drivers/Makefile
    +++ b/drivers/staging/comedi/drivers/Makefile
    @@ -8,8 +8,10 @@ obj-$(CONFIG_COMEDI) += comedi_test.o
    obj-$(CONFIG_COMEDI) += comedi_parport.o
    obj-$(CONFIG_COMEDI) += pcm_common.o

    +# Comedi 8255 module
    +obj-$(CONFIG_COMEDI_8255) += 8255.o
    # Comedi PCI drivers
    -obj-$(CONFIG_COMEDI_PCI_DRIVERS) += 8255.o
    obj-$(CONFIG_COMEDI_PCI_DRIVERS) += acl7225b.o
    obj-$(CONFIG_COMEDI_PCI_DRIVERS) += addi_apci_035.o
    obj-$(CONFIG_COMEDI_PCI_DRIVERS) += addi_apci_1032.o

     \ /
      Last update: 2010-08-06 21:03    [W:0.041 / U:18.720 seconds]
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