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authorDenis Kirjanov <dkirjanov@hera.kernel.org>2010-07-08 14:24:51 +0400
committerDavid S. Miller <davem@davemloft.net>2010-07-09 10:39:49 +0400
commit301e9d96bf65292f916a3936d63c504ac7792ee6 (patch)
treed8262d45ab7bbd348f7993cad9f7704574c008f8 /drivers/net/ll_temac_main.c
parent47562e5d325af9ce5306bce53eb7cdd353fe46be (diff)
downloadlinux-301e9d96bf65292f916a3936d63c504ac7792ee6.tar.xz
ll_temac: fix DMA resources leak
V2: Check pointers before releasing resources. Fix DMA resources leak. Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Diffstat (limited to 'drivers/net/ll_temac_main.c')
-rw-r--r--drivers/net/ll_temac_main.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/net/ll_temac_main.c b/drivers/net/ll_temac_main.c
index fa303c881a48..b57d0ff52519 100644
--- a/drivers/net/ll_temac_main.c
+++ b/drivers/net/ll_temac_main.c
@@ -193,6 +193,35 @@ static int temac_dcr_setup(struct temac_local *lp, struct of_device *op,
#endif
/**
+ * * temac_dma_bd_release - Release buffer descriptor rings
+ */
+static void temac_dma_bd_release(struct net_device *ndev)
+{
+ struct temac_local *lp = netdev_priv(ndev);
+ int i;
+
+ for (i = 0; i < RX_BD_NUM; i++) {
+ if (!lp->rx_skb[i])
+ break;
+ else {
+ dma_unmap_single(ndev->dev.parent, lp->rx_bd_v[i].phys,
+ XTE_MAX_JUMBO_FRAME_SIZE, DMA_FROM_DEVICE);
+ dev_kfree_skb(lp->rx_skb[i]);
+ }
+ }
+ if (lp->rx_bd_v)
+ dma_free_coherent(ndev->dev.parent,
+ sizeof(*lp->rx_bd_v) * RX_BD_NUM,
+ lp->rx_bd_v, lp->rx_bd_p);
+ if (lp->tx_bd_v)
+ dma_free_coherent(ndev->dev.parent,
+ sizeof(*lp->tx_bd_v) * TX_BD_NUM,
+ lp->tx_bd_v, lp->tx_bd_p);
+ if (lp->rx_skb)
+ kfree(lp->rx_skb);
+}
+
+/**
* temac_dma_bd_init - Setup buffer descriptor rings
*/
static int temac_dma_bd_init(struct net_device *ndev)
@@ -275,6 +304,7 @@ static int temac_dma_bd_init(struct net_device *ndev)
return 0;
out:
+ temac_dma_bd_release(ndev);
return -ENOMEM;
}
@@ -858,6 +888,8 @@ static int temac_stop(struct net_device *ndev)
phy_disconnect(lp->phy_dev);
lp->phy_dev = NULL;
+ temac_dma_bd_release(ndev);
+
return 0;
}