[patch] 2.4.20-pre5 DMI blacklist IBM Thinkpad in i2c/sensors

[patch] 2.4.20-pre5 DMI blacklist IBM Thinkpad in i2c/sensors

[Albert Cranford]

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Hello Marcelo,
The attached patch add capability to blacklist IBM ThinkPads in i2c/sensors by
updating global variable.
Thanks,
Albert
-- 
ac9410@attbi.com

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--- linux/arch/i386/kernel/dmi_scan.c.orig     2002-07-31 23:10:21.000000000 -0400
+++ linux/arch/i386/kernel/dmi_scan.c	2002-08-19 23:51:07.000000000 -0400
@@ -13,6 +13,7 @@
 
 unsigned long dmi_broken;
 int is_sony_vaio_laptop;
+int is_unsafe_smbus;
 
 struct dmi_header
 {
@@ -476,6 +477,20 @@
 }
 
 
+/* 
+ * Don't access SMBus on IBM systems which get corrupted eeproms 
+ */
+
+static __init int disable_smbus(struct dmi_blacklist *d)
+{
+	if (is_unsafe_smbus == 0)
+	{
+		is_unsafe_smbus = 1;
+		printk(KERN_INFO "%s machine detected. Disabling SMBus accesses.\n", d->ident);
+	}
+	return 0;
+}
+
 /*
  *	Simple "print if true" callback
  */
@@ -765,6 +780,15 @@
 			NO_MATCH, NO_MATCH, NO_MATCH
 			} },
 
+	/*
+	 *	SMBus / sensors settings
+	 */
+	 
+	{ disable_smbus, "IBM", {
+			MATCH(DMI_SYS_VENDOR, "IBM"),
+			NO_MATCH, NO_MATCH, NO_MATCH
+			} },
+
 	{ NULL, }
 };