PCI: of: Destroy changeset when adding PCI device node fails

Previously of_pci_make_dev_node() leaked a cset if it failed to create a
device node for the PCI device with of_changeset_create_node().

Destroy the cset if of_changeset_create_node() fails.

Fixes: 407d1a5 ("PCI: Create device tree node for bridge")
Link: https://lore.kernel.org/r/1696007417-42059-1-git-send-email-lizhi.hou@amd.com
Reported-by: Herve Codina <herve.codina@bootlin.com>
Closes: https://lore.kernel.org/all/20230911171319.495bb837@bootlin.com/
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
[bhelgaas: commit log]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Herve Codina <herve.codina@bootlin.com>

Author: houlz0507

drivers/pci/of.c

@@ -657,30 +657,33 @@ void of_pci_make_dev_node(struct pci_dev *pdev)
 
 	cset = kmalloc(sizeof(*cset), GFP_KERNEL);
 	if (!cset)
-		goto failed;
+		goto out_free_name;
 	of_changeset_init(cset);
 
 	np = of_changeset_create_node(cset, ppnode, name);
 	if (!np)
-		goto failed;
-	np->data = cset;
+		goto out_destroy_cset;
 
 	ret = of_pci_add_properties(pdev, cset, np);
 	if (ret)
-		goto failed;
+		goto out_free_node;
 
 	ret = of_changeset_apply(cset);
 	if (ret)
-		goto failed;
+		goto out_free_node;
 
+	np->data = cset;
 	pdev->dev.of_node = np;
 	kfree(name);
 
 	return;
 
-failed:
-	if (np)
-		of_node_put(np);
+out_free_node:
+	of_node_put(np);
+out_destroy_cset:
+	of_changeset_destroy(cset);
+	kfree(cset);
+out_free_name:
 	kfree(name);
 }
 #endif