net: fec: ensure fec_enet_free_buffers() properly cleans the rings
Ensure that we do not double-free any allocations, and that any transmit
skbuffs are properly freed when we clean up the rings.
Acked-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 9c5570a..5499bd8 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2079,8 +2079,13 @@
}
bdp = fep->tx_bd_base;
- for (i = 0; i < fep->tx_ring_size; i++)
+ for (i = 0; i < fep->tx_ring_size; i++) {
kfree(fep->tx_bounce[i]);
+ fep->tx_bounce[i] = NULL;
+ skb = fep->tx_skbuff[i];
+ fep->tx_skbuff[i] = NULL;
+ dev_kfree_skb(skb);
+ }
}
static int fec_enet_alloc_buffers(struct net_device *ndev)