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>
---
 drivers/platform/x86/intel/vsec.c | 9 ++++++---
 include/linux/intel_vsec.h        | 5 +++--
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c
index db3c031d1757..055ca9f48fb4 100644
--- a/drivers/platform/x86/intel/vsec.c
+++ b/drivers/platform/x86/intel/vsec.c
@@ -332,13 +332,16 @@ 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");
 
diff --git a/include/linux/intel_vsec.h b/include/linux/intel_vsec.h
index b94beab64610..bc95821f1bfb 100644
--- a/include/linux/intel_vsec.h
+++ b/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
-- 
2.43.0