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 @@
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;
}