From: Ben Hutchings <bhutchings@solarflare.com>
Date: Mon, 1 Sep 2008 11:46:36 +0000 (+0100)
Subject: sfc: Don't leak PCI DMA maps in the TSO code when the queue fills up
X-Git-Tag: v2.6.28-rc1~717^2~368
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5988b63a53e120a9db4439d4512f4c1b17e7170e;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git

sfc: Don't leak PCI DMA maps in the TSO code when the queue fills up

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

diff --git a/drivers/net/sfc/tx.c b/drivers/net/sfc/tx.c
index e5e0bab..0452ea6 100644
--- a/drivers/net/sfc/tx.c
+++ b/drivers/net/sfc/tx.c
@@ -1096,6 +1096,11 @@ static int efx_enqueue_skb_tso(struct efx_tx_queue *tx_queue,
 		efx_stop_queue(tx_queue->efx);
 
  unwind:
+	/* Free the DMA mapping we were in the process of writing out */
+	if (state.ifc.unmap_len)
+		pci_unmap_page(tx_queue->efx->pci_dev, state.ifc.unmap_addr,
+			       state.ifc.unmap_len, PCI_DMA_TODEVICE);
+
 	efx_enqueue_unwind(tx_queue);
 	return rc2;
 }