From: Arthur Jones It is possible that the BIOS did not enable ECC at boot time. We check for that case and fail to load if it is true. Signed-off-by: Arthur Jones Signed-off-by: Doug Thompson Signed-off-by: Andrew Morton --- drivers/edac/i5100_edac.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff -puN drivers/edac/i5100_edac.c~edac-i5100-fix-enable-ecc-hardware drivers/edac/i5100_edac.c --- a/drivers/edac/i5100_edac.c~edac-i5100-fix-enable-ecc-hardware +++ a/drivers/edac/i5100_edac.c @@ -24,6 +24,8 @@ /* register addresses and bit field accessors... */ /* device 16, func 1 */ +#define I5100_MC 0x40 /* Memory Control Register */ +#define I5100_MC_ERRDETEN(a) ((a) >> 5 & 1) #define I5100_MS 0x44 /* Memory Status Register */ #define I5100_SPDDATA 0x48 /* Serial Presence Detect Status Reg */ #define I5100_SPDDATA_RDO(a) ((a) >> 15 & 1) @@ -688,6 +690,14 @@ static int __devinit i5100_init_one(stru goto bail; } + /* ECC enabled? */ + pci_read_config_dword(pdev, I5100_MC, &dw); + if (!I5100_MC_ERRDETEN(dw)) { + printk(KERN_INFO "i5100_edac: ECC not enabled.\n"); + ret = -ENODEV; + goto bail; + } + /* figure out how many ranks, from strapped state of 48GB_Mode input */ pci_read_config_dword(pdev, I5100_MS, &dw); ranksperch = !!(dw & (1 << 8)) * 2 + 4; _