leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

hwmon: (k10temp) Do not blacklist known working CPU models

Browse Source 
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
This commit is contained in:
Jean Delvare 2010-06-20 09:22:31 +02:00
parent 7e27d6e778
commit eefc2d9e3d
1 changed files with 12 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/hwmon/k10temp.c
View File

@ -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, &reg_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,