linux-kernel - [PATCH V6 05/20] platform/x86/intel/vsec: Use cleanup.h

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Date:   Wed, 29 Nov 2023 14:21:17 -0800
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 V6 05/20] platform/x86/intel/vsec: Use cleanup.h

Use cleanup.h helpers to handle cleanup of resources in
intel_vsec_add_dev() after failures.

Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
V6 - No change

V5 - Assign no_free_ptr(res) to resource member. This fixes __must_check_fn
     warning.
   - Remove unsed ret variable.

V4 - Do no_free_ptr() before and in call to intel_vsec_add_aux().
   - Add resource cleanup in this patch.

V3 - New patch.

 drivers/platform/x86/intel/vsec.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/platform/x86/intel/vsec.c b/drivers/platform/x86/intel/vsec.c
index ba352af65dde..27e8698ebe5e 100644
--- a/drivers/platform/x86/intel/vsec.c
+++ b/drivers/platform/x86/intel/vsec.c
@@ -15,6 +15,7 @@
 
 #include <linux/auxiliary_bus.h>
 #include <linux/bits.h>
+#include <linux/cleanup.h>
 #include <linux/delay.h>
 #include <linux/kernel.h>
 #include <linux/idr.h>
@@ -147,8 +148,9 @@ EXPORT_SYMBOL_NS_GPL(intel_vsec_add_aux, INTEL_VSEC);
 static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *header,
 			      struct intel_vsec_platform_info *info)
 {
-	struct intel_vsec_device *intel_vsec_dev;
-	struct resource *res, *tmp;
+	struct intel_vsec_device __free(kfree) *intel_vsec_dev = NULL;
+	struct resource __free(kfree) *res = NULL;
+	struct resource *tmp;
 	unsigned long quirks = info->quirks;
 	int i;
 
@@ -170,10 +172,8 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
 		return -ENOMEM;
 
 	res = kcalloc(header->num_entries, sizeof(*res), GFP_KERNEL);
-	if (!res) {
-		kfree(intel_vsec_dev);
+	if (!res)
 		return -ENOMEM;
-	}
 
 	if (quirks & VSEC_QUIRK_TABLE_SHIFT)
 		header->offset >>= TABLE_OFFSET_SHIFT;
@@ -191,7 +191,7 @@ 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->resource = no_free_ptr(res);
 	intel_vsec_dev->num_resources = header->num_entries;
 	intel_vsec_dev->quirks = info->quirks;
 
@@ -200,7 +200,11 @@ static int intel_vsec_add_dev(struct pci_dev *pdev, struct intel_vsec_header *he
 	else
 		intel_vsec_dev->ida = &intel_vsec_ida;
 
-	return intel_vsec_add_aux(pdev, NULL, intel_vsec_dev,
+	/*
+	 * Pass the ownership of intel_vsec_dev and resource within it to
+	 * intel_vsec_add_aux()
+	 */
+	return intel_vsec_add_aux(pdev, NULL, no_free_ptr(intel_vsec_dev),
 				  intel_vsec_name(header->id));
 }
 
-- 
2.34.1