[PATCH v3 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 v3:

Patch 1 "Encode node and MC info into mc_idx":
- Drop mc_idx_u32 temporary variable; pass &mci->mc_idx directly
- Rename device property mc-per-node -> mcs-per-node

Patch 2 "Get DIMM size from ACPI _DSM method":
- Fix subject: get -> Get
- No code changes

Patch 3 "Add CS4-7 timeout filter for cross-node access":
- No changes

Changes in v2:

Patch 1 "Encode node and MC info into mc_idx":
- Use char other_detail[64] = {0} and drop the else branch
- Put snprintf() on one line
- Initialize mc_idx_valid = true and drop the else branch
- Validate mc-per-node firmware property is non-zero to prevent
  division by zero
- Wrap pvt_init() function definition to satisfy 100-column limit

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

v2: https://lore.kernel.org/all/20260805085414.1482-1-zhaoqunqin@xxxxxxxxxxx/
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 | 82 ++++++++++++++++++++++++++++++++----
 1 file changed, 74 insertions(+), 8 deletions(-)


base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482
-- 
2.47.3