diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2012-06-26 20:00:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-06-27 01:24:16 -0700 |
| commit | 91c77550000a7d888aaf9f9ac13e3e3485d18560 (patch) | |
| tree | 063cd97e431d239421118532625e8ebe05bdd07d | |
| parent | 2ecbb783c3bf5a63f555c39deef308dcc1902b7f (diff) | |
| download | linux-91c77550000a7d888aaf9f9ac13e3e3485d18560.tar.bz2 | |
net: sh_eth: fix up the buffer pointers
After freeing the buffer, the driver should change the value of
the pointer to NULL.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/renesas/sh_eth.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index 43e76d21e57f..2dd2ff5ecb5a 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -788,6 +788,7 @@ static void sh_eth_ring_free(struct net_device *ndev) } } kfree(mdp->rx_skbuff); + mdp->rx_skbuff = NULL; /* Free Tx skb ringbuffer */ if (mdp->tx_skbuff) { @@ -797,6 +798,7 @@ static void sh_eth_ring_free(struct net_device *ndev) } } kfree(mdp->tx_skbuff); + mdp->tx_skbuff = NULL; } /* format skb and descriptor buffer */ @@ -933,10 +935,31 @@ desc_ring_free: skb_ring_free: /* Free Rx and Tx skb ring buffer */ sh_eth_ring_free(ndev); + mdp->tx_ring = NULL; + mdp->rx_ring = NULL; return ret; } +static void sh_eth_free_dma_buffer(struct sh_eth_private *mdp) +{ + int ringsize; + + if (mdp->rx_ring) { + ringsize = sizeof(struct sh_eth_rxdesc) * RX_RING_SIZE; + dma_free_coherent(NULL, ringsize, mdp->rx_ring, + mdp->rx_desc_dma); + mdp->rx_ring = NULL; + } + + if (mdp->tx_ring) { + ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE; + dma_free_coherent(NULL, ringsize, mdp->tx_ring, + mdp->tx_desc_dma); + mdp->tx_ring = NULL; + } +} + static int sh_eth_dev_init(struct net_device *ndev) { int ret = 0; @@ -1677,7 +1700,6 @@ static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev) static int sh_eth_close(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); - int ringsize; netif_stop_queue(ndev); @@ -1700,12 +1722,7 @@ static int sh_eth_close(struct net_device *ndev) sh_eth_ring_free(ndev); /* free DMA buffer */ - ringsize = sizeof(struct sh_eth_rxdesc) * RX_RING_SIZE; - dma_free_coherent(NULL, ringsize, mdp->rx_ring, mdp->rx_desc_dma); - - /* free DMA buffer */ - ringsize = sizeof(struct sh_eth_txdesc) * TX_RING_SIZE; - dma_free_coherent(NULL, ringsize, mdp->tx_ring, mdp->tx_desc_dma); + sh_eth_free_dma_buffer(mdp); pm_runtime_put_sync(&mdp->pdev->dev); |