From 5ee726db521fddf991f261e5c45e04a7d2bf1bc1 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Fri, 15 Feb 2013 08:45:00 -0300 Subject: ghes_edac: Don't credit the same memory dimm twice On my tests on a 4xE5-4650 CPU's system, the GHES EDAC driver is called twice. As the SMBIOS DMI enumeration call will seek for the entire DIMM sockets in the system, on this machine, equipped with 128 GB of RAM, the memory is displayed twice: +-----------------------+ | mc0 | mc1 | ----------+-----------------------+ memory45: | 8192 MB | 8192 MB | memory44: | 0 MB | 0 MB | ----------+-----------------------+ memory43: | 0 MB | 0 MB | memory42: | 8192 MB | 8192 MB | ----------+-----------------------+ memory41: | 0 MB | 0 MB | memory40: | 0 MB | 0 MB | ----------+-----------------------+ memory39: | 8192 MB | 8192 MB | memory38: | 0 MB | 0 MB | ----------+-----------------------+ memory37: | 0 MB | 0 MB | memory36: | 8192 MB | 8192 MB | ----------+-----------------------+ memory35: | 0 MB | 0 MB | memory34: | 0 MB | 0 MB | ----------+-----------------------+ memory33: | 8192 MB | 8192 MB | memory32: | 0 MB | 0 MB | ----------+-----------------------+ memory31: | 0 MB | 0 MB | memory30: | 8192 MB | 8192 MB | ----------+-----------------------+ memory29: | 0 MB | 0 MB | memory28: | 0 MB | 0 MB | ----------+-----------------------+ memory27: | 8192 MB | 8192 MB | memory26: | 0 MB | 0 MB | ----------+-----------------------+ memory25: | 0 MB | 0 MB | memory24: | 8192 MB | 8192 MB | ----------+-----------------------+ memory23: | 0 MB | 0 MB | memory22: | 0 MB | 0 MB | ----------+-----------------------+ memory21: | 8192 MB | 8192 MB | memory20: | 0 MB | 0 MB | ----------+-----------------------+ memory19: | 0 MB | 0 MB | memory18: | 8192 MB | 8192 MB | ----------+-----------------------+ memory17: | 0 MB | 0 MB | memory16: | 0 MB | 0 MB | ----------+-----------------------+ memory15: | 8192 MB | 8192 MB | memory14: | 0 MB | 0 MB | ----------+-----------------------+ memory13: | 0 MB | 0 MB | memory12: | 8192 MB | 8192 MB | ----------+-----------------------+ memory11: | 0 MB | 0 MB | memory10: | 0 MB | 0 MB | ----------+-----------------------+ memory9: | 8192 MB | 8192 MB | memory8: | 0 MB | 0 MB | ----------+-----------------------+ memory7: | 0 MB | 0 MB | memory6: | 8192 MB | 8192 MB | ----------+-----------------------+ memory5: | 0 MB | 0 MB | memory4: | 0 MB | 0 MB | ----------+-----------------------+ memory3: | 8192 MB | 8192 MB | memory2: | 0 MB | 0 MB | ----------+-----------------------+ memory1: | 0 MB | 0 MB | memory0: | 8192 MB | 8192 MB | ----------+-----------------------+ Total sum of 256 GB. As there's no reliable way to credit DIMMS to the right memory controller, just put everything on memory controller 0 (with should always exist). Signed-off-by: Mauro Carvalho Chehab --- drivers/edac/ghes_edac.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c index 22ac29e4733f..fb866804820c 100644 --- a/drivers/edac/ghes_edac.c +++ b/drivers/edac/ghes_edac.c @@ -287,10 +287,19 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev) mci->dev_name = "ghes"; if (!fake) { - /* Fill DIMM info from DMI */ - dimm_fill.count = 0; - dimm_fill.mci = mci; - dmi_walk(ghes_edac_dmidecode, &dimm_fill); + /* + * Fill DIMM info from DMI for the memory controller #0 + * + * Keep it in blank for the other memory controllers, as + * there's no reliable way to properly credit each DIMM to + * the memory controller, as different BIOSes fill the + * DMI bank location fields on different ways + */ + if (!ghes_edac_mc_num) { + dimm_fill.count = 0; + dimm_fill.mci = mci; + dmi_walk(ghes_edac_dmidecode, &dimm_fill); + } } else { struct dimm_info *dimm = EDAC_DIMM_PTR(mci->layers, mci->dimms, mci->n_layers, 0, 0, 0); -- cgit v1.2.1