[PATCH] Make sure therm_adt746x only handles known hardware

This patch limits therm_adt746x to currently existing fan controllers in
Apple laptops.  It may avoid problems with future hardware.

Signed-off-by: Colin Leroy <colin@colino.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/macintosh/therm_adt746x.c b/drivers/macintosh/therm_adt746x.c
index e0ac63e..c7e84ab 100644 (file)
--- a/drivers/macintosh/therm_adt746x.c
+++ b/drivers/macintosh/therm_adt746x.c
@@ -545,6 +545,12 @@ thermostat_init(void)
        else
                return -ENODEV;
 
+       prop = (u32 *)get_property(np, "hwsensor-params-version", NULL);
+       printk(KERN_INFO "adt746x: version %d (%ssupported)\n", *prop,
+                        (*prop == 1)?"":"un");
+       if (*prop != 1)
+               return -ENODEV;
+
        prop = (u32 *)get_property(np, "reg", NULL);
        if (!prop)
                return -ENODEV;