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| author | Jean Delvare <khali@linux-fr.org> | 2010-06-20 09:22:31 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2010-06-20 09:22:31 +0200 |
| commit | eefc2d9e3d4f8820f2c128a0e44a23de28b1ed64 (patch) | |
| tree | fcff0271f0258a9dd5519d7a820b3a2f5868c27a /drivers/hwmon/k10temp.c | |
| parent | 7e27d6e778cd87b6f2415515d7127eba53fe5d02 (diff) | |
| download | lwn-eefc2d9e3d4f8820f2c128a0e44a23de28b1ed64.tar.gz lwn-eefc2d9e3d4f8820f2c128a0e44a23de28b1ed64.zip | |
hwmon: (k10temp) Do not blacklist known working CPU models
When detecting AM2+ or AM3 socket with DDR2, only blacklist cores
which are known to exist in AM2+ format.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: stable@kernel.org
Diffstat (limited to 'drivers/hwmon/k10temp.c')
| -rw-r--r-- | drivers/hwmon/k10temp.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/hwmon/k10temp.c b/drivers/hwmon/k10temp.c index 099a2138cdf6..da5a2404cd3e 100644 --- a/drivers/hwmon/k10temp.c +++ b/drivers/hwmon/k10temp.c @@ -112,11 +112,21 @@ static bool __devinit has_erratum_319(struct pci_dev *pdev) if (pkg_type != CPUID_PKGTYPE_AM2R2_AM3) return false; - /* Differentiate between AM2+ (bad) and AM3 (good) */ + /* DDR3 memory implies socket AM3, which is good */ pci_bus_read_config_dword(pdev->bus, PCI_DEVFN(PCI_SLOT(pdev->devfn), 2), REG_DCT0_CONFIG_HIGH, ®_dram_cfg); - return !(reg_dram_cfg & DDR3_MODE); + if (reg_dram_cfg & DDR3_MODE) + return false; + + /* + * Unfortunately it is possible to run a socket AM3 CPU with DDR2 + * memory. We blacklist all the cores which do exist in socket AM2+ + * format. It still isn't perfect, as RB-C2 cores exist in both AM2+ + * and AM3 formats, but that's the best we can do. + */ + return boot_cpu_data.x86_model < 4 || + (boot_cpu_data.x86_model == 4 && boot_cpu_data.x86_mask <= 2); } static int __devinit k10temp_probe(struct pci_dev *pdev, |