Subject: [PATCH 14/52] sfc: Don't leak PCI DMA maps in the TSO code when the queue fills up

From: Ben Hutchings <[email-masked]>
Date: Mon, 1 Sep 2008 12:46:36 +0100

Signed-off-by: Ben Hutchings <[email-masked]>
---
 drivers/net/sfc/tx.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

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;
 }
-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.