Hi.
Please review upstream 3.18 commit
351fc4a99d49fde63fe5ab7412beb35c40d27269 "sb_edac: avoid INTERNAL
ERROR message in EDAC with unspecified channel" for stable trees <
3.18.
I'm not sure how far back this patch should go to but it appears it is
applicable at least as far back as 3.10.
commit 351fc4a99d49fde63fe5ab7412beb35c40d27269
Author: Seth Jennings <sjenning@xxxxxxxxxx>
Date: Fri Sep 5 14:28:47 2014 -0500
sb_edac: avoid INTERNAL ERROR message in EDAC with unspecified channel
Intel IA32 SDM Table 15-14 defines channel 0xf as 'not specified', but
EDAC doesn't know about this and returns and INTERNAL ERROR when the
channel is greater than NUM_CHANNELS:
kernel: [ 1538.886456] CPU 0: Machine Check Exception: 0 Bank 1:
940000000000009f
kernel: [ 1538.886669] TSC 2bc68b22e7e812 ADDR 46dae7000 MISC 0
PROCESSOR 0:306e4 TIME 1390414572 SOCKET 0 APIC 0
kernel: [ 1538.971948] EDAC MC1: INTERNAL ERROR: channel value is
out of range (15 >= 4)
kernel: [ 1538.972203] EDAC MC1: 0 CE memory read error on unknown
memory (slot:0 page:0x46dae7 offset:0x0 grain:0 syndrome:0x0 -
area:DRAM err_code:0000:009f socket:1 channel_mask:1 rank:0)
This commit changes sb_edac to forward a channel of -1 to EDAC if the
channel is not specified. edac_mc_handle_error() sets the channel to -1
internally after the error message anyway, so this commit should have no
effect other than avoiding the INTERNAL ERROR message when the channel
is not specified.
Signed-off-by: Seth Jennings <sjenning@xxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
Cheers,
Vinson
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