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[SCSI] add wrapper to access and set scsi_bus_type in struct acpi_bus_type 

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>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Holger Macht 2012-06-25 16:13:02 +08:00 committed by Jeff Garzik
parent 9acc7bde23
commit de50ada55b
2 changed files with 27 additions and 0 deletions
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17
drivers/scsi/scsi_lib.c
View File

@ -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

10
include/scsi/scsi.h
View File

@ -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.