linux-kernel - [PATCH 08/27] ACPICA: Update handling of PCI ID lists.

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Date:	Wed, 30 Apr 2014 10:04:20 +0800
From:	Lv Zheng <lv.zheng@...el.com>
To:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Len Brown <len.brown@...el.com>
Cc:	Lv Zheng <lv.zheng@...el.com>, Lv Zheng <zetalog@...il.com>,
	<linux-kernel@...r.kernel.org>, linux-acpi@...r.kernel.org,
	"David E. Box" <david.e.box@...ux.intel.com>,
	Bob Moore <robert.moore@...el.com>
Subject: [PATCH 08/27] ACPICA: Update handling of PCI ID lists.

From: "David E. Box" <david.e.box@...ux.intel.com>

More of a style cleanup. if hw_build_pci_list is to return a non-zero
status, it now deletes any partial ID list that has been constructed.
if it returns AE_OK, the caller is responsible for list deletion.
David Box.

Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
Signed-off-by: Bob Moore <robert.moore@...el.com>
Signed-off-by: Lv Zheng <lv.zheng@...el.com>
---
 drivers/acpi/acpica/hwpci.c |   15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/acpi/acpica/hwpci.c b/drivers/acpi/acpica/hwpci.c
index e701d8c..6aade8e 100644
--- a/drivers/acpi/acpica/hwpci.c
+++ b/drivers/acpi/acpica/hwpci.c
@@ -140,11 +140,12 @@ acpi_hw_derive_pci_id(struct acpi_pci_id *pci_id,
 		/* Walk the list, updating the PCI device/function/bus numbers */
 
 		status = acpi_hw_process_pci_list(pci_id, list_head);
-	}
 
-	/* Always delete the list */
+		/* Delete the list */
+
+		acpi_hw_delete_pci_list(list_head);
+	}
 
-	acpi_hw_delete_pci_list(list_head);
 	return_ACPI_STATUS(status);
 }
 
@@ -187,6 +188,10 @@ acpi_hw_build_pci_list(acpi_handle root_pci_device,
 	while (1) {
 		status = acpi_get_parent(current_device, &parent_device);
 		if (ACPI_FAILURE(status)) {
+
+			/* Must delete the list before exit */
+
+			acpi_hw_delete_pci_list(*return_list_head);
 			return (status);
 		}
 
@@ -199,6 +204,10 @@ acpi_hw_build_pci_list(acpi_handle root_pci_device,
 
 		list_element = ACPI_ALLOCATE(sizeof(struct acpi_pci_device));
 		if (!list_element) {
+
+			/* Must delete the list before exit */
+
+			acpi_hw_delete_pci_list(*return_list_head);
 			return (AE_NO_MEMORY);
 		}
 
-- 
1.7.10

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