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Box" To: thomas.hellstrom@linux.intel.com, rodrigo.vivi@intel.com, irenic.rajneesh@gmail.com, ilpo.jarvinen@linux.intel.com, srinivas.pandruvada@linux.intel.com, intel-xe@lists.freedesktop.org, dri-devel@lists.freedesktop.org, xi.pardee@linux.intel.com Cc: david.e.box@linux.intel.com, hansg@kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: [PATCH 21/22] platform/x86/intel/pmc/ssram: Make PMT registration optional Date: Thu, 12 Mar 2026 18:52:00 -0700 Message-ID: <20260313015202.3660072-22-david.e.box@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260313015202.3660072-1-david.e.box@linux.intel.com> References: <20260313015202.3660072-1-david.e.box@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable The SSRAM telemetry driver extracts essential PMC device ID and power management base address information that intel_pmc_core depends on for core functionality. PMT registration failure should not prevent this critical data from being available, as it would break intel_pmc_core operation entirely. 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 --- drivers/platform/x86/intel/pmc/ssram_telemetry.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/platform/x86/intel/pmc/ssram_telemetry.c b/drivers/pla= tform/x86/intel/pmc/ssram_telemetry.c index b937ebb2322f..12b7c1299c2f 100644 --- a/drivers/platform/x86/intel/pmc/ssram_telemetry.c +++ b/drivers/platform/x86/intel/pmc/ssram_telemetry.c @@ -106,6 +106,7 @@ pmc_ssram_telemetry_get_pmc_pci(struct pci_dev *pcidev,= unsigned int pmc_idx, u3 void __iomem __free(pmc_ssram_telemetry_iounmap) *tmp_ssram =3D NULL; void __iomem __free(pmc_ssram_telemetry_iounmap) *ssram =3D NULL; u64 ssram_base; + int ret; =20 ssram_base =3D pci_resource_start(pcidev, 0); tmp_ssram =3D ioremap(ssram_base, SSRAM_HDR_SIZE); @@ -133,7 +134,11 @@ pmc_ssram_telemetry_get_pmc_pci(struct pci_dev *pcidev= , unsigned int pmc_idx, u3 pmc_ssram_get_devid_pwrmbase(ssram, pmc_idx); =20 /* Find and register and PMC telemetry entries */ - return pmc_ssram_telemetry_add_pmt(pcidev, ssram_base, ssram); + ret =3D pmc_ssram_telemetry_add_pmt(pcidev, ssram_base, ssram); + if (ret) + dev_warn(&pcidev->dev, "could not register PMT\n"); + + return 0; } =20 static int pmc_ssram_telemetry_pci_init(struct pci_dev *pcidev) @@ -208,12 +213,12 @@ static int pmc_ssram_telemetry_acpi_init(struct pci_d= ev *pcidev, =20 ret =3D intel_vsec_register(&pcidev->dev, &info); if (ret) - goto cleanup_acpi_disc; + dev_warn(&pcidev->dev, "could not register PMT\n"); =20 ret =3D pmc_ssram_telemetry_get_pmc_acpi(pcidev, index); =20 -cleanup_acpi_disc: kfree(acpi_disc); + cleanup_acpi_buf: ACPI_FREE(buf.pointer); =20 --=20 2.43.0