mca: fix bus matching

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 <James.Bottomley@SteelEye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/mca/mca-bus.c b/drivers/mca/mca-bus.c
index da862e4632dd0535b1c6047c3be5377b8f1bf1f8..a70fe00aea16e3c8a2460909f335c89dc079c4cf 100644 (file)
--- a/drivers/mca/mca-bus.c
+++ b/drivers/mca/mca-bus.c
@@ -47,7 +47,7 @@ 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 short *mca_ids = mca_drv->id_table;
+       const unsigned short *mca_ids = mca_drv->id_table;
        int i;
 
        if (!mca_ids)