From: James Bottomley There's a bug in the MCA bus matching algorithm in that it promotes from signed short to int before comparing with the actual id and does sign extension on anything > 0x7fff (which means that pos ids > 0x7fff never get correctly matched). Signed-off-by: James Bottomley Signed-off-by: Andrew Morton --- drivers/mca/mca-bus.c | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) diff -puN drivers/mca/mca-bus.c~mca-fix-bus-matching drivers/mca/mca-bus.c --- a/drivers/mca/mca-bus.c~mca-fix-bus-matching +++ a/drivers/mca/mca-bus.c @@ -47,7 +47,7 @@ static int mca_bus_match (struct device { struct mca_device *mca_dev = to_mca_device (dev); struct mca_driver *mca_drv = to_mca_driver (drv); - const short *mca_ids = mca_drv->id_table; + const unsigned short *mca_ids = mca_drv->id_table; int i; if (!mca_ids) _