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-rw-r--r--drivers/i2c/busses/i2c-piix4.c32
1 files changed, 30 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 7217410f425..ac916596858 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -108,7 +108,27 @@ static int srvrworks_csb5_delay;
static struct pci_driver piix4_driver;
static struct i2c_adapter piix4_adapter;
-static struct dmi_system_id __devinitdata piix4_dmi_table[] = {
+static struct dmi_system_id __devinitdata piix4_dmi_blacklist[] = {
+ {
+ .ident = "Sapphire AM2RD790",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "SAPPHIRE Inc."),
+ DMI_MATCH(DMI_BOARD_NAME, "PC-AM2RD790"),
+ },
+ },
+ {
+ .ident = "DFI Lanparty UT 790FX",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "DFI Inc."),
+ DMI_MATCH(DMI_BOARD_NAME, "LP UT 790FX"),
+ },
+ },
+ { }
+};
+
+/* The IBM entry is in a separate table because we only check it
+ on Intel-based systems */
+static struct dmi_system_id __devinitdata piix4_dmi_ibm[] = {
{
.ident = "IBM",
.matches = { DMI_MATCH(DMI_SYS_VENDOR, "IBM"), },
@@ -127,8 +147,16 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
(PIIX4_dev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5))
srvrworks_csb5_delay = 1;
+ /* On some motherboards, it was reported that accessing the SMBus
+ caused severe hardware problems */
+ if (dmi_check_system(piix4_dmi_blacklist)) {
+ dev_err(&PIIX4_dev->dev,
+ "Accessing the SMBus on this system is unsafe!\n");
+ return -EPERM;
+ }
+
/* Don't access SMBus on IBM systems which get corrupted eeproms */
- if (dmi_check_system(piix4_dmi_table) &&
+ if (dmi_check_system(piix4_dmi_ibm) &&
PIIX4_dev->vendor == PCI_VENDOR_ID_INTEL) {
dev_err(&PIIX4_dev->dev, "IBM system detected; this module "
"may corrupt your serial eeprom! Refusing to load "