diff options
| author | Denis Kirjanov <dkirjanov@hera.kernel.org> | 2010-06-30 23:39:05 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-07-01 22:45:53 -0700 |
| commit | fe62c298e5bcff8b3414205b7b54975918b3b5c4 (patch) | |
| tree | 6c1cb2b694ce4b29ec8963929609ae3a9377c0f1 | |
| parent | ee3cb6295144b0adfa75ccaca307643a6998b1e2 (diff) | |
ll_temac: add error checking to DMA init path
Add error checking to DMA descriptor rings initialization code.
Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ll_temac_main.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/net/ll_temac_main.c b/drivers/net/ll_temac_main.c index 52dcc8495647..7b12d0e8f4bd 100644 --- a/drivers/net/ll_temac_main.c +++ b/drivers/net/ll_temac_main.c @@ -202,14 +202,29 @@ static int temac_dma_bd_init(struct net_device *ndev) int i; lp->rx_skb = kzalloc(sizeof(*lp->rx_skb) * RX_BD_NUM, GFP_KERNEL); + if (!lp->rx_skb) { + dev_err(&ndev->dev, + "can't allocate memory for DMA RX buffer\n"); + goto out; + } /* allocate the tx and rx ring buffer descriptors. */ /* returns a virtual addres and a physical address. */ lp->tx_bd_v = dma_alloc_coherent(ndev->dev.parent, sizeof(*lp->tx_bd_v) * TX_BD_NUM, &lp->tx_bd_p, GFP_KERNEL); + if (!lp->tx_bd_v) { + dev_err(&ndev->dev, + "unable to allocate DMA TX buffer descriptors"); + goto out; + } lp->rx_bd_v = dma_alloc_coherent(ndev->dev.parent, sizeof(*lp->rx_bd_v) * RX_BD_NUM, &lp->rx_bd_p, GFP_KERNEL); + if (!lp->rx_bd_v) { + dev_err(&ndev->dev, + "unable to allocate DMA RX buffer descriptors"); + goto out; + } memset(lp->tx_bd_v, 0, sizeof(*lp->tx_bd_v) * TX_BD_NUM); for (i = 0; i < TX_BD_NUM; i++) { @@ -227,7 +242,7 @@ static int temac_dma_bd_init(struct net_device *ndev) if (skb == 0) { dev_err(&ndev->dev, "alloc_skb error %d\n", i); - return -1; + goto out; } lp->rx_skb[i] = skb; /* returns physical address of skb->data */ @@ -258,6 +273,9 @@ static int temac_dma_bd_init(struct net_device *ndev) lp->dma_out(lp, TX_CURDESC_PTR, lp->tx_bd_p); return 0; + +out: + return -ENOMEM; } /* --------------------------------------------------------------------- @@ -505,7 +523,10 @@ static void temac_device_reset(struct net_device *ndev) } lp->dma_out(lp, DMA_CONTROL_REG, DMA_TAIL_ENABLE); - temac_dma_bd_init(ndev); + if (temac_dma_bd_init(ndev)) { + dev_err(&ndev->dev, + "temac_device_reset descriptor allocation failed\n"); + } temac_indirect_out32(lp, XTE_RXC0_OFFSET, 0); temac_indirect_out32(lp, XTE_RXC1_OFFSET, 0); |