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authorJames Bottomley <James.Bottomley@SteelEye.com>2007-05-09 02:33:30 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-09 12:30:49 -0700
commit8813d1c00ca923c1683da625ff85959be1db9a49 (patch)
treedb16312db25ccfbef05f7cb05b58a9a6423f7b54 /drivers/mca
parent809aa5048fb7e7fd3bf0aa1fb169c42db0f63b08 (diff)
downloadlwn-8813d1c00ca923c1683da625ff85959be1db9a49.tar.gz
lwn-8813d1c00ca923c1683da625ff85959be1db9a49.zip
mca: add integrated device bus matching
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 <James.Bottomley@SteelEye.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mca')
-rw-r--r--drivers/mca/mca-bus.c26
-rw-r--r--drivers/mca/mca-driver.c13
2 files changed, 29 insertions, 10 deletions
diff --git a/drivers/mca/mca-bus.c b/drivers/mca/mca-bus.c
index a70fe00aea16..67b8e9453b19 100644
--- a/drivers/mca/mca-bus.c
+++ b/drivers/mca/mca-bus.c
@@ -48,18 +48,24 @@ static int mca_bus_match (struct device *dev, struct device_driver *drv)
struct mca_device *mca_dev = to_mca_device (dev);
struct mca_driver *mca_drv = to_mca_driver (drv);
const unsigned short *mca_ids = mca_drv->id_table;
- int i;
-
- if (!mca_ids)
- return 0;
-
- for(i = 0; mca_ids[i]; i++) {
- if (mca_ids[i] == mca_dev->pos_id) {
- mca_dev->index = i;
- return 1;
+ int i = 0;
+
+ if (mca_ids) {
+ for(i = 0; mca_ids[i]; i++) {
+ if (mca_ids[i] == mca_dev->pos_id) {
+ mca_dev->index = i;
+ 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 --git a/drivers/mca/mca-driver.c b/drivers/mca/mca-driver.c
index 2223466b3d8a..32cd39bcc715 100644
--- a/drivers/mca/mca-driver.c
+++ b/drivers/mca/mca-driver.c
@@ -36,12 +36,25 @@ int mca_register_driver(struct mca_driver *mca_drv)
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)