platform/x86/intel/pmc/ssram: Make PMT registration optional

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@linux.intel.com>
Link: https://patch.msgid.link/4f4c324977951f6082bf2218c8b911e1ae7e0a7b.1781294741.git.david.e.box@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/drivers/platform/x86/intel/pmc/ssram_telemetry.c b/drivers/platform/x86/intel/pmc/ssram_telemetry.c
index 10462fa7ebbfe0ba479728ac380f6aa253bbe61a..9a8922045ab74a0c2004ae3d1f633ba97807c08b 100644 (file)
--- a/drivers/platform/x86/intel/pmc/ssram_telemetry.c
+++ b/drivers/platform/x86/intel/pmc/ssram_telemetry.c
@@ -198,7 +198,7 @@ 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);
 
@@ -291,7 +291,7 @@ 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);
 }