From: James Bottomley The MCA bus has a few "integrated" functions, which are effectively virtual slots on the bus. The problem is that these special functions don't have dedicated pos IDs, so we have to manufacture ids for them outside the pos space ... and these ids can't be matched by the standard matching function, so add a special registration that requests a list of pos ids or a particular integrated function. Signed-off-by: James Bottomley Signed-off-by: Andrew Morton --- drivers/mca/mca-bus.c | 9 ++++++++- drivers/mca/mca-driver.c | 13 +++++++++++++ include/linux/mca.h | 2 ++ 3 files changed, 23 insertions(+), 1 deletion(-) diff -puN drivers/mca/mca-bus.c~mca-add-integrated-device-bus-matching drivers/mca/mca-bus.c --- a/drivers/mca/mca-bus.c~mca-add-integrated-device-bus-matching +++ a/drivers/mca/mca-bus.c @@ -59,7 +59,14 @@ static int mca_bus_match (struct device return 1; } } - + /* If the integrated id is present, treat it as though it were an + * additional id in the id_table (it can't be because by definition, + * integrated id's overflow a short */ + if (mca_drv->integrated_id && mca_dev->pos_id == + mca_drv->integrated_id) { + mca_dev->index = i; + return 1; + } return 0; } diff -puN drivers/mca/mca-driver.c~mca-add-integrated-device-bus-matching drivers/mca/mca-driver.c --- a/drivers/mca/mca-driver.c~mca-add-integrated-device-bus-matching +++ a/drivers/mca/mca-driver.c @@ -36,12 +36,25 @@ int mca_register_driver(struct mca_drive mca_drv->driver.bus = &mca_bus_type; if ((r = driver_register(&mca_drv->driver)) < 0) return r; + mca_drv->integrated_id = 0; } return 0; } EXPORT_SYMBOL(mca_register_driver); +int mca_register_driver_integrated(struct mca_driver *mca_driver, + int integrated_id) +{ + int r = mca_register_driver(mca_driver); + + if (!r) + mca_driver->integrated_id = integrated_id; + + return r; +} +EXPORT_SYMBOL(mca_register_driver_integrated); + void mca_unregister_driver(struct mca_driver *mca_drv) { if (MCA_bus) diff -puN include/linux/mca.h~mca-add-integrated-device-bus-matching include/linux/mca.h --- a/include/linux/mca.h~mca-add-integrated-device-bus-matching +++ a/include/linux/mca.h @@ -94,6 +94,7 @@ struct mca_bus { struct mca_driver { const short *id_table; void *driver_data; + int integrated_id; struct device_driver driver; }; #define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver) @@ -125,6 +126,7 @@ extern enum MCA_AdapterStatus mca_device extern struct bus_type mca_bus_type; extern int mca_register_driver(struct mca_driver *drv); +extern int mca_register_driver_integrated(struct mca_driver *, int); extern void mca_unregister_driver(struct mca_driver *drv); /* WARNING: only called by the boot time device setup */ _