diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-nforce2.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-nforce2.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-nforce2.c b/drivers/i2c/busses/i2c-nforce2.c index 3dac920e53ea..43c9f8df9509 100644 --- a/drivers/i2c/busses/i2c-nforce2.c +++ b/drivers/i2c/busses/i2c-nforce2.c @@ -50,6 +50,7 @@ #include <linux/init.h> #include <linux/i2c.h> #include <linux/delay.h> +#include <linux/dmi.h> #include <asm/io.h> MODULE_LICENSE("GPL"); @@ -109,6 +110,18 @@ struct nforce2_smbus { /* Misc definitions */ #define MAX_TIMEOUT 100 +/* We disable the second SMBus channel on these boards */ +static struct dmi_system_id __devinitdata nforce2_dmi_blacklist2[] = { + { + .ident = "DFI Lanparty NF4 Expert", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "DFI Corp,LTD"), + DMI_MATCH(DMI_BOARD_NAME, "LP UT NF4 Expert"), + }, + }, + { } +}; + static struct pci_driver nforce2_driver; static void nforce2_abort(struct i2c_adapter *adap) @@ -367,10 +380,17 @@ static int __devinit nforce2_probe(struct pci_dev *dev, const struct pci_device_ smbuses[0].base = 0; /* to have a check value */ } /* SMBus adapter 2 */ - res2 = nforce2_probe_smb(dev, 5, NFORCE_PCI_SMB2, &smbuses[1], "SMB2"); - if (res2 < 0) { - dev_err(&dev->dev, "Error probing SMB2.\n"); - smbuses[1].base = 0; /* to have a check value */ + if (dmi_check_system(nforce2_dmi_blacklist2)) { + dev_err(&dev->dev, "Disabling SMB2 for safety reasons.\n"); + res2 = -EPERM; + smbuses[1].base = 0; + } else { + res2 = nforce2_probe_smb(dev, 5, NFORCE_PCI_SMB2, &smbuses[1], + "SMB2"); + if (res2 < 0) { + dev_err(&dev->dev, "Error probing SMB2.\n"); + smbuses[1].base = 0; /* to have a check value */ + } } if ((res1 < 0) && (res2 < 0)) { /* we did not find even one of the SMBuses, so we give up */ |