rapidio: convert switch drivers to modules

Rework RapidIO switch drivers to add an option to build them as loadable
kernel modules.

This patch removes RapidIO-specific vmlinux section and converts switch
drivers to be compatible with LDM driver registration method.  To simplify
registration of device-specific callback routines this patch introduces
rio_switch_ops data structure.  The sw_sysfs() callback is removed from
the list of device-specific operations because under the new structure its
functions can be handled by switch driver's probe() and remove() routines.

If a specific switch device driver is not loaded the RapidIO subsystem
core will use default standard-based operations to configure a switch.
Because the current implementation of RapidIO enumeration/discovery method
relies on availability of device-specific operations for error management,
switch device drivers must be loaded before the RapidIO
enumeration/discovery starts.

This patch also moves several common routines from enumeration/discovery
module into the RapidIO core code to make switch-specific operations
accessible to all components of RapidIO subsystem.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Andre van Herk <andre.van.herk@Prodrive.nl>
Cc: Micha Nelissen <micha.nelissen@Prodrive.nl>
Cc: Stef van Os <stef.van.os@Prodrive.nl>
Cc: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/rapidio/rio-sysfs.c b/drivers/rapidio/rio-sysfs.c
index 66d4acd5e18f..864e52f193e1 100644
--- a/drivers/rapidio/rio-sysfs.c
+++ b/drivers/rapidio/rio-sysfs.c
@@ -257,8 +257,6 @@ int rio_create_sysfs_dev_files(struct rio_dev *rdev)
                 err |= device_create_file(&rdev->dev, &dev_attr_routes);
                 err |= device_create_file(&rdev->dev, &dev_attr_lnext);
                 err |= device_create_file(&rdev->dev, &dev_attr_hopcount);
-                if (!err && rdev->rswitch->sw_sysfs)
-                        err = rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_CREATE);
         }
 
         if (err)
@@ -281,8 +279,6 @@ void rio_remove_sysfs_dev_files(struct rio_dev *rdev)
                 device_remove_file(&rdev->dev, &dev_attr_routes);
                 device_remove_file(&rdev->dev, &dev_attr_lnext);
                 device_remove_file(&rdev->dev, &dev_attr_hopcount);
-                if (rdev->rswitch->sw_sysfs)
-                        rdev->rswitch->sw_sysfs(rdev, RIO_SW_SYSFS_REMOVE);
         }
 }