From: Yazen Ghannam yazen.ghannam@amd.com
mainline inclusion from mainline-v5.5-rc1 commit 466503d6b1b33be46ab87c6090f0ade6c6011cbc category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4MKP4 CVE: NA
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The following commit introduced a warning on error reports without a non-zero grain value.
3724ace582d9 ("EDAC/mc: Fix grain_bits calculation")
The amd64_edac_mod module does not provide a value, so the warning will be given on the first reported memory error.
Set the grain per DIMM to cacheline size (64 bytes). This is the current recommendation.
Fixes: 3724ace582d9 ("EDAC/mc: Fix grain_bits calculation") Signed-off-by: Yazen Ghannam yazen.ghannam@amd.com Signed-off-by: Borislav Petkov bp@suse.de Cc: "linux-edac@vger.kernel.org" linux-edac@vger.kernel.org Cc: James Morse james.morse@arm.com Cc: Mauro Carvalho Chehab mchehab@kernel.org Cc: Robert Richter rrichter@marvell.com Cc: Tony Luck tony.luck@intel.com Link: https://lkml.kernel.org/r/20191022203448.13962-7-Yazen.Ghannam@amd.com Signed-off-by: Jackie Liu liuyun01@kylinos.cn Signed-off-by: Laibin Qiu qiulaibin@huawei.com --- drivers/edac/amd64_edac.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index a128baec5faf..62dd8032f2d8 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -2928,6 +2928,7 @@ static int init_csrows_df(struct mem_ctl_info *mci) dimm->mtype = pvt->dram_type; dimm->edac_mode = edac_mode; dimm->dtype = dev_type; + dimm->grain = 64; } }
@@ -3004,6 +3005,7 @@ static int init_csrows(struct mem_ctl_info *mci) dimm = csrow->channels[j]->dimm; dimm->mtype = pvt->dram_type; dimm->edac_mode = edac_mode; + dimm->grain = 64; } }