Changeset 4053

Timestamp:

06/23/06 17:08:03 (2 years ago)

Author:

khali

Message:

Properly document on which systems the i2c-piix4 SMBus driver will
refuse to load. Hopefully this will make it clearer for users, which
were often wondering why their destop or server systems were detected
as laptops.

Files:

• lm-sensors/trunk/CHANGES (modified) (1 diff)
• lm-sensors/trunk/doc/busses/i2c-piix4 (modified) (1 diff)
• lm-sensors/trunk/kernel/busses/i2c-piix4.c (modified) (1 diff)

lm-sensors/trunk/CHANGES

@@ -3 +3 @@
-
-2.10.1 (2006????)
+  File doc/busses/i2c-piix4: Update (2.6 backport)
-  File etc/sensors.conf.eg: Add an smsc47m192 section
-  Library: Fix device scan when no i2c support is present

lm-sensors/trunk/doc/busses/i2c-piix4

@@ -86 +86 @@
-Please note that you don't need to do that in all cases, just when the SMBus is
-not working properly.
+
+
+Hardware-specific issues
+------------------------
+
+This driver will refuse to load on IBM systems with an Intel PIIX4 SMBus.
+Some of these machines have an RFID EEPROM (24RF08) connected to the SMBus,
+which can easily get corrupted due to a state machine bug. These are mostly
+Thinkpad laptops, but desktop systems may also be affected. We have no list
+of all affected systems, so the only safe solution was to prevent access to
+the SMBus on all IBM systems (detected using DMI data.)
+
+For additional information, read:
+http://www2.lm-sensors.nu/~lm78/cvs/lm_sensors2/README.thinkpad

lm-sensors/trunk/kernel/busses/i2c-piix4.c

@@ -138 +138 @@
-#ifdef CONFIG_X86
-        if(ibm_dmi_probe() && PIIX4_dev->vendor == PCI_VENDOR_ID_INTEL) {
-Laptop
+system
-                        "may corrupt your serial eeprom! Refusing to load "
-                        "module!\n");