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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/mca-bus.c
parent809aa5048fb7e7fd3bf0aa1fb169c42db0f63b08 (diff)
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/mca-bus.c')
-rw-r--r--drivers/mca/mca-bus.c26
1 files changed, 16 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;
}