From: Colin Leroy <colin@colino.net>
Date: Wed, 25 May 2005 19:31:34 +0000 (-0700)
Subject: [PATCH] Make sure therm_adt746x only handles known hardware
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a8bacec09352b86bd389cc93a20008577fa14764;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[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 e0ac63effa55..c7e84abe8951 100644
--- 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;