[PATCH 3.8 34/81] ACPI / PCI: Fix memory leak in acpi_pci_irq_enable()

[Kamal Mostafa]

3.8.13.20 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tomasz Nowicki <tomasz.nowicki at linaro.org>

commit b685f3b1744061aa9ad822548ba9c674de5be7c6 upstream.

acpi_pci_link_allocate_irq() can return negative gsi even if
entry != NULL.  For that case we have a memory leak, so free
entry before returning from acpi_pci_irq_enable() for gsi < 0.

Signed-off-by: Tomasz Nowicki <tomasz.nowicki at linaro.org>
[rjw: Subject and changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki at intel.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/acpi/pci_irq.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 68a921d..bee8d6d 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -470,6 +470,8 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
 			dev_warn(&dev->dev, "PCI INT %c: no GSI\n",
 				 pin_name(pin));
 		}
+
+		kfree(entry);
 		return 0;
 	}
 
-- 
1.8.3.2