[PATCH] PCI/MSI: Fix memory leak in pci_alloc_irq_vectors_affinity INTx path

[neilfsun <loyou85@gmail.com>]

In the INTx fallback path of pci_alloc_irq_vectors_affinity(),
affinity masks are created and never freed.

Signed-off-by: neilfsun <neilfsun@tencent.com>
Signed-off-by: Sun Feng <loyou85@gmail.com>
---
 drivers/pci/msi/api.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/msi/api.c b/drivers/pci/msi/api.c
index c18559b6272c..c1377f74b8f3 100644
--- a/drivers/pci/msi/api.c
+++ b/drivers/pci/msi/api.c
@@ -280,14 +280,17 @@ int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
 	/* use INTx IRQ if allowed */
 	if (flags & PCI_IRQ_INTX) {
 		if (min_vecs == 1 && dev->irq) {
+			struct irq_affinity_desc *masks = NULL;
+
 			/*
 			 * Invoke the affinity spreading logic to ensure that
 			 * the device driver can adjust queue configuration
 			 * for the single interrupt case.
 			 */
 			if (affd)
-				irq_create_affinity_masks(1, affd);
+				masks = irq_create_affinity_masks(1, affd);
 			pci_intx(dev, 1);
+			kfree(masks);
 			return 1;
 		}
 	}
-- 
2.52.0