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    Subject[PATCH v4 01/13] [SCSI]: add wrapper to access and set scsi_bus_type in struct acpi_bus_type
    Date
    From: Holger Macht <holger@homac.de>

    For being able to bind ata devices against acpi devices, scsi_bus_type
    needs to be set as bus in struct acpi_bus_type. So add wrapper to
    scsi_lib to accomplish that.

    Signed-off-by: Holger Macht <holger@homac.de>
    Signed-off-by: Lin Ming <ming.m.lin@intel.com>
    ---
    drivers/scsi/scsi_lib.c | 17 +++++++++++++++++
    include/scsi/scsi.h | 10 ++++++++++
    2 files changed, 27 insertions(+), 0 deletions(-)

    diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
    index 5dfd749..a243212 100644
    --- a/drivers/scsi/scsi_lib.c
    +++ b/drivers/scsi/scsi_lib.c
    @@ -68,6 +68,23 @@ static struct scsi_host_sg_pool scsi_sg_pools[] = {

    struct kmem_cache *scsi_sdb_cache;

    +#ifdef CONFIG_ACPI
    +#include <acpi/acpi_bus.h>
    +
    +int scsi_register_acpi_bus_type(struct acpi_bus_type *bus)
    +{
    + bus->bus = &scsi_bus_type;
    + return register_acpi_bus_type(bus);
    +}
    +EXPORT_SYMBOL_GPL(scsi_register_acpi_bus_type);
    +
    +void scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus)
    +{
    + unregister_acpi_bus_type(bus);
    +}
    +EXPORT_SYMBOL_GPL(scsi_unregister_acpi_bus_type);
    +#endif
    +
    /*
    * When to reinvoke queueing after a resource shortage. It's 3 msecs to
    * not change behaviour from the previous unplug mechanism, experimentation
    diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
    index f34a5a8..4527b3a 100644
    --- a/include/scsi/scsi.h
    +++ b/include/scsi/scsi.h
    @@ -214,6 +214,16 @@ scsi_command_size(const unsigned char *cmnd)
    scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
    }

    +#ifdef CONFIG_ACPI
    +struct acpi_bus_type;
    +
    +extern int
    +scsi_register_acpi_bus_type(struct acpi_bus_type *bus);
    +
    +extern void
    +scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus);
    +#endif
    +
    /*
    * SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
    * T10/1561-D Revision 4 Draft dated 7th November 2002.
    --
    1.7.2.5


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