[PATCH v6 14/15] platform/x86/intel/pmc/ssram: Make PMT registration optional

[David E. Box]

The SSRAM telemetry driver extracts essential PMC device ID and power
management base address information that intel_pmc_core depends on for core
functionality. If PMT registration failure prevents this critical data from
being available, intel_pmc_core operation would break entirely. Therefore,
PMT registration failures must not block access to this data.

Change the behavior to log a warning when PMT registration fails but
continue with successful driver initialization, ensuring the primary
telemetry data remains accessible to dependent drivers.

Signed-off-by: David E. Box <david.e.box@xxxxxxxxxxxxxxx>
---
V6 - No changes

V5 - No changes

V4 - No changes

V3 changes:
  - Dropped the standalone cleanup-pattern patch from this refreshed
    series retaining the simpler ssram pointer flow requested in review.
  - Folded PMT-registration-optional handling onto that simpler flow
    with no intended functional change.

V2 changes:
  - Update commit message for clarity
  - Also apply the PCI telemetry path

 drivers/platform/x86/intel/pmc/ssram_telemetry.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/intel/pmc/ssram_telemetry.c b/drivers/platform/x86/intel/pmc/ssram_telemetry.c
index 7ebfbb177499..b7cc4b540221 100644
--- a/drivers/platform/x86/intel/pmc/ssram_telemetry.c
+++ b/drivers/platform/x86/intel/pmc/ssram_telemetry.c
@@ -195,7 +195,7 @@ pmc_ssram_telemetry_get_pmc_pci(struct pci_dev *pcidev,
 	/* Find and register and PMC telemetry entries */
 	ret = pmc_ssram_telemetry_add_pmt(pcidev, ssram_base, ssram);
 	if (ret)
-		return ret;
+		dev_warn(&pcidev->dev, "could not register PMT\n");
 
 	probe_cache->valid_mask |= BIT(pmc_idx);
 
@@ -288,7 +288,7 @@ static int pmc_ssram_telemetry_acpi_init(struct pci_dev *pcidev,
 
 	ret = intel_vsec_register(&pcidev->dev, &info);
 	if (ret)
-		return ret;
+		dev_warn(&pcidev->dev, "could not register PMT\n");
 
 	return pmc_ssram_telemetry_get_pmc_acpi(pcidev, probe_cache, index);
 }
-- 
2.43.0