In acpi_pci_irq_enable(), 'entry' is allocated by invoking
acpi_pci_irq_lookup(). However, it is not deallocated if
acpi_pci_irq_valid() returns false, leading to a memory leak. To fix this
issue, free 'entry' before returning 0.

Signed-off-by: Wenwen Wang <wen...@cs.uga.edu>
---
 drivers/acpi/pci_irq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index d2549ae..dea8a60 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -449,8 +449,10 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
                 * No IRQ known to the ACPI subsystem - maybe the BIOS /
                 * driver reported one, then use it. Exit in any case.
                 */
-               if (!acpi_pci_irq_valid(dev, pin))
+               if (!acpi_pci_irq_valid(dev, pin)) {
+                       kfree(entry);
                        return 0;
+               }
 
                if (acpi_isa_register_gsi(dev))
                        dev_warn(&dev->dev, "PCI INT %c: no GSI\n",
-- 
2.7.4

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