[PATCH 3.11 047/131] ACPI / PCI: Fix memory leak in acpi_pci_irq_enable()

[Luis Henriques]

3.11.10.6 -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: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/acpi/pci_irq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 41c5e1b..f658e09 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -432,6 +432,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
 				 pin_name(pin));
 		}
 
+		kfree(entry);
 		return 0;
 	}
 
-- 
1.9.0