platform/x86:intel/vsec: Change return type of intel_vsec_register

JIRA: https://issues.redhat.com/browse/RHEL-110838

commit 812bca7
Author: Xi Pardee <xi.pardee@linux.intel.com>
Date:   Fri Apr 25 12:52:29 2025 -0700

    platform/x86:intel/vsec: Change return type of intel_vsec_register

    Change return type of intel_vsec_register() to int. The current
    implementation does not indicate if the register fail or not.
    Change to return error code if it fails or if INTEL_VSEC config
    is not set. This is a preparation step to introduce a new SSRAM
    Telemetry driver that will be using this API.

    Signed-off-by: Xi Pardee <xi.pardee@linux.intel.com>
    Link: https://lore.kernel.org/r/20250425195237.493129-2-xi.pardee@linux.intel.com
    Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
    Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

Signed-off-by: Steve Best <sbest@redhat.com>

Author: sfbest

drivers/platform/x86/intel/vsec.c

@@ -338,13 +338,16 @@ static bool intel_vsec_walk_vsec(struct pci_dev *pdev,
 	return have_devices;
 }
 
-void intel_vsec_register(struct pci_dev *pdev,
+int intel_vsec_register(struct pci_dev *pdev,
 			 struct intel_vsec_platform_info *info)
 {
 	if (!pdev || !info || !info->headers)
-		return;
+		return -EINVAL;
 
-	intel_vsec_walk_header(pdev, info);
+	if (!intel_vsec_walk_header(pdev, info))
+		return -ENODEV;
+	else
+		return 0;
 }
 EXPORT_SYMBOL_NS_GPL(intel_vsec_register, "INTEL_VSEC");
 

include/linux/intel_vsec.h

@@ -139,12 +139,13 @@ static inline struct intel_vsec_device *auxdev_to_ivdev(struct auxiliary_device
 }
 
 #if IS_ENABLED(CONFIG_INTEL_VSEC)
-void intel_vsec_register(struct pci_dev *pdev,
+int intel_vsec_register(struct pci_dev *pdev,
 			 struct intel_vsec_platform_info *info);
 #else
-static inline void intel_vsec_register(struct pci_dev *pdev,
+static inline int intel_vsec_register(struct pci_dev *pdev,
 				       struct intel_vsec_platform_info *info)
 {
+	return -ENODEV;
 }
 #endif
 #endif