** Changed in: linux (Ubuntu)
Status: In Progress => Fix Committed
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[Artful/Zesty] ACPI APEI error handling bug fixes
Status in linux package in Ubuntu:
Status in linux source package in Zesty:
Status in linux source package in Artful:
Error records which have multiple errors in them will incorrectly report all
errors after the first one. This results in garbage non-standard error trace
events to be generated, and for AER and MC errors there will be no kernel
action to help recover from these errors in the AER and EDAC drivers.
Patches in Linus tree fixes this issue:
aaf2c2fb0f51 ACPI / APEI: clear error status before acknowledging the error
c4335fdd3822 ACPI: APEI: fix the wrong iteration of generic error status block
Insert a e1000 pcie card into the system, run the following command that
should generate PCIe correctable errors, you will see only the first error in
each GHES report go to the AER driver rather than all errors from the GHES
$ sudo setpci -s 0002:00:00.0 0x70c.l=0x00808000;sudo setpci -s
0002:00:00.0 CAP_EXP+0x10.B=0x4b;sleep 1;sudo setpci -s 0002:00:00.0
Where "0002:00:00.0" being the root hub for the card.
Used JTAG to trigger multiple concurrent errors, and observed that all
errors were parsed, instead of just the first one. As mentioned in
comment #3. So, the poster of comment #3 will do the verification once
the patch lands in -proposed.
The two patches to ACPI APEI driver was cleanly cherry picked from linus's
tree and applied to Artful and Zesty. The patches were tested on QDF2400
platform where it was found to issue and don't introduce any regressions.
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