[aqc1xx] Free outstanding receive I/O buffers on close

atl_close() freed the descriptor rings but left the posted receive I/O
buffers allocated, leaking them and tripping an assertion on the next
open.  Free any outstanding receive I/O buffers in atl_close().

Signed-off-by: Animesh Bhatt <animeshb@marvell.com>

src/drivers/net/marvell/aqc1xx.c

diff --git a/src/drivers/net/marvell/aqc1xx.c b/src/drivers/net/marvell/aqc1xx.c
index 59445ba..0ee574f 100644
--- a/src/drivers/net/marvell/aqc1xx.c
+++ b/src/drivers/net/marvell/aqc1xx.c
@@ -262,6 +262,7 @@
 */
 static void atl_close ( struct net_device *netdev ) {
 	struct atl_nic *nic = netdev->priv;
+	unsigned int i;
 
 	nic->hw_ops->stop ( nic );
 	/* rpb global ctrl */
@@ -282,6 +283,13 @@
 
 	atl_ring_free ( &nic->tx_ring );
 	atl_ring_free ( &nic->rx_ring );
+
+	/* Discard any outstanding receive I/O buffers */
+	for ( i = 0 ; i < ATL_RING_SIZE ; i++ ) {
+		if ( nic->iobufs[i] )
+			free_rx_iob ( nic->iobufs[i] );
+		nic->iobufs[i] = NULL;
+	}
 }
 
 /**