[PATCH v2 0/3] EDAC/loongson: Improvements for Loongson EDAC driver

[Qunqin Zhao]

This series contains three patches for the Loongson EDAC driver:

Patch 1: Encode node and MC info into mc_idx so that on multi-node
systems, sysfs entries uniquely identify each controller.

Patch 2: Get DIMM size from ACPI _DSM method instead of using hardcoded
values, enabling correct display of memory size in sysfs.

Patch 3: Add CS4-7 timeout filter for cross-node access on 3C6000
multi-node systems to prevent false CE error reports.

Changes in v2:

Patch 1 "Encode node and MC info into mc_idx":
- mc_per_node -> mcs_per_node
- Use char other_detail[64] = {0} and drop the else branch
- Put snprintf() on one line
- If the definition of pvt_init is placed on a single line, it will
  exceed 100 characters, so the line break is kept.

- Use a temporary u32 variable for mc-idx to silence incompatible
  pointer type warning from device_property_read_u32(). Then keep
  the 'else' branch.
- Validate mc-per-node firmware property is non-zero to prevent
  division by zero

Patch 2 "get DIMM size from ACPI _DSM method":
- No changes; rebased on top of updated patch 1.

Patch 3 "Add CS4-7 timeout filter for cross-node access":
- Assign valid_cs_bits before calling read_ecc() in pvt_init() to
  prevent using uninitialized data when establishing the baseline
  error count
- Add bounds check for valid_cs_bits < 64 to guard against undefined
  behavior when shifting a 64-bit value by 64 bits
- Rename device property valid_cs_bits -> valid-cs-bits to match
  standard DT/ACPI _DSD hyphen convention

v1: https://lore.kernel.org/all/20260730063035.230686-1-zhaoqunqin@xxxxxxxxxxx/

Qunqin Zhao (1):
  EDAC/loongson: Add CS4-7 timeout filter for cross-node access

Wang Jinwei (2):
  EDAC/loongson: Encode node and MC info into mc_idx
  EDAC/loongson: get DIMM size from ACPI _DSM method

 drivers/edac/loongson_edac.c | 84 ++++++++++++++++++++++++++++++++----
 1 file changed, 76 insertions(+), 8 deletions(-)


base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482
-- 
2.47.3