Commit dc4e8c07e9e2 ("ACPI: APEI: explicit init of HEST and GHES in
apci_init()") introduced a bug that ghes_edac_register() would be invoked
before edac_init(). Because at that time, the bus "edac" hasn't been even
registered, this created sysfs /devices/mc0 instead of
/sys/devices/system/edac/mc/mc0 on an Ampere eMag server.
The solution is modularizing the ghes_edac driver.
I tested the cases as follows:
1. build test with ghes_edac built-in and module on Aarch64
2. build test with ghes_edac built-in and module on x86_64
3. boot test with ghes_edac built-in and module on Aarch64
4. modprobe and -r for multiple times on Aarch64.
Jia He (2):
efi/cper: export several helpers for ghes edac to use
EDAC/ghes: Modularize ghes_edac driver to remove the dependency on
ghes
drivers/acpi/apei/ghes.c | 49 ++++++++++++++++++++++--
drivers/edac/Kconfig | 4 +-
drivers/edac/ghes_edac.c | 74 ++++++++++++++++++++++++++-----------
drivers/firmware/efi/cper.c | 3 ++
include/acpi/ghes.h | 33 ++++-------------
5 files changed, 110 insertions(+), 53 deletions(-)
--
2.25.1
