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DateWed, 28 Aug 2002 00:34:13 -0400 (EDT)
FromAlbert Cranford <>
Subject[patch] 2.5.32 blacklist IBM Thinkpads from i2c/sensors

-- 
ac9410@attbi.com
--- linux/arch/i386/kernel/dmi_scan.c.orig     2002-07-31 23:10:21.000000000 -0400
+++ linux/arch/i386/kernel/dmi_scan.c	2002-08-27 22:45:12.000000000 -0400
@@ -12,6 +12,7 @@
 
 unsigned long dmi_broken;
 int is_sony_vaio_laptop;
+int is_unsafe_smbus;
 
 struct dmi_header
 {
@@ -459,6 +460,20 @@
 	return 0;
 }
 
+/* 
+ * 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
  */
@@ -732,6 +747,15 @@
 			NO_MATCH, NO_MATCH, NO_MATCH
 			} },
 
+	/*
+	 *	SMBus / sensors settings
+	 */
+	 
+	{ disable_smbus, "IBM", {
+			MATCH(DMI_SYS_VENDOR, "IBM"),
+			NO_MATCH, NO_MATCH, NO_MATCH
+			} },
+
 	{ NULL, }
 };
 	
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