linux-kernel - [PATCH V3 02/16] platform/x86/intel/vsec: remove platform

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Date:   Wed, 11 Oct 2023 19:38:26 -0700
From:   "David E. Box" <david.e.box@...ux.intel.com>
To:     linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        ilpo.jarvinen@...ux.intel.com, rajvi.jingar@...ux.intel.com
Subject: [PATCH V3 02/16] platform/x86/intel/vsec: remove platform_info from vsec device structure

In preparation for exporting an API to register Intel Vendor Specific
Extended Capabilities (VSEC) from other drivers, remove the pointer to
platform_info from intel_vsec_device. This prevents a potential page fault
when auxiliary drivers probe and attempt to dereference this pointer to
access the needed quirks field. Instead, just add the quirks to
intel_vsec_device.

Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
V3 - No change

V2 - New patch splitting previous PATCH 1

 drivers/platform/x86/intel/pmt/class.c | 2 +-
 drivers/platform/x86/intel/vsec.c      | 2 +-
 drivers/platform/x86/intel/vsec.h      | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c
index f32a233470de..2ad91d2fd954 100644
--- a/drivers/platform/x86/intel/pmt/class.c
+++ b/drivers/platform/x86/intel/pmt/class.c
@@ -31,7 +31,7 @@ bool intel_pmt_is_early_client_hw(struct device *dev)
 	 * differences from the server platforms (which use the Out Of Band
 	 * Management Services Module OOBMSM).
 	 */
-	return !!(ivdev->info->quirks & VSEC_QUIRK_EARLY_HW);
+	return !!(ivdev->quirks & VSEC_QUIRK_EARLY_HW);
 }
 EXPORT_SYMBOL_NS_GPL(intel_pmt_is_early_client_hw, INTEL_PMT);
 
diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c
index 6bb233a23414..15866b7d3117 100644
--- a/drivers/platform/x86/intel/vsec.c
+++ b/drivers/platform/x86/intel/vsec.c
@@ -201,7 +201,7 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
 	intel_vsec_dev->pcidev = pdev;
 	intel_vsec_dev->resource = res;
 	intel_vsec_dev->num_resources = header->num_entries;
-	intel_vsec_dev->info = info;
+	intel_vsec_dev->quirks = info->quirks;
 
 	if (header->id == VSEC_ID_SDSI)
 		intel_vsec_dev->ida = &intel_vsec_sdsi_ida;
diff --git a/drivers/platform/x86/intel/vsec.h b/drivers/platform/x86/intel/vsec.h
index c242c07ea69c..8b9fad170503 100644
--- a/drivers/platform/x86/intel/vsec.h
+++ b/drivers/platform/x86/intel/vsec.h
@@ -79,11 +79,11 @@ struct intel_vsec_device {
 	struct pci_dev *pcidev;
 	struct resource *resource;
 	struct ida *ida;
-	struct intel_vsec_platform_info *info;
 	int num_resources;
 	int id; /* xa */
 	void *priv_data;
 	size_t priv_data_size;
+	unsigned long quirks;
 };
 
 int intel_vsec_add_aux(struct pci_dev *pdev, struct device *parent,
-- 
2.34.1