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authorLarry Finger <Larry.Finger@lwfinger.net>2012-12-27 17:25:41 +0000
committerDavid S. Miller <davem@davemloft.net>2012-12-28 15:30:28 -0800
commit612a7c4e73f3306f3b599c60681194c1931a2dbc (patch)
treebe67f0bfa735a3fd7eab6e19a56b335c8935bc81 /drivers/net
parent681726689052be0cd2f6287fd9878eba51883f48 (diff)
downloadop-kernel-dev-612a7c4e73f3306f3b599c60681194c1931a2dbc.zip
op-kernel-dev-612a7c4e73f3306f3b599c60681194c1931a2dbc.tar.gz
forcedeth: Fix WARNINGS that result when DMA mapping is not checked
With 3.8-rc1, the first call of pci_map_single() that is not checked with a corresponding pci_dma_mapping_error() call results in a warning with a splat as follows: WARNING: at lib/dma-debug.c:933 check_unmap+0x480/0x950() Hardware name: HP Pavilion dv2700 Notebook PC forcedeth 0000:00:0a.0: DMA-API: device driver failed to check map error[device address=0x00000000b176e002] [size=90 bytes] [mapped as single] Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/nvidia/forcedeth.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
index 653487d..87fa591 100644
--- a/drivers/net/ethernet/nvidia/forcedeth.c
+++ b/drivers/net/ethernet/nvidia/forcedeth.c
@@ -1821,6 +1821,11 @@ static int nv_alloc_rx(struct net_device *dev)
skb->data,
skb_tailroom(skb),
PCI_DMA_FROMDEVICE);
+ if (pci_dma_mapping_error(np->pci_dev,
+ np->put_rx_ctx->dma)) {
+ kfree_skb(skb);
+ goto packet_dropped;
+ }
np->put_rx_ctx->dma_len = skb_tailroom(skb);
np->put_rx.orig->buf = cpu_to_le32(np->put_rx_ctx->dma);
wmb();
@@ -1830,6 +1835,7 @@ static int nv_alloc_rx(struct net_device *dev)
if (unlikely(np->put_rx_ctx++ == np->last_rx_ctx))
np->put_rx_ctx = np->first_rx_ctx;
} else {
+packet_dropped:
u64_stats_update_begin(&np->swstats_rx_syncp);
np->stat_rx_dropped++;
u64_stats_update_end(&np->swstats_rx_syncp);
@@ -1856,6 +1862,11 @@ static int nv_alloc_rx_optimized(struct net_device *dev)
skb->data,
skb_tailroom(skb),
PCI_DMA_FROMDEVICE);
+ if (pci_dma_mapping_error(np->pci_dev,
+ np->put_rx_ctx->dma)) {
+ kfree_skb(skb);
+ goto packet_dropped;
+ }
np->put_rx_ctx->dma_len = skb_tailroom(skb);
np->put_rx.ex->bufhigh = cpu_to_le32(dma_high(np->put_rx_ctx->dma));
np->put_rx.ex->buflow = cpu_to_le32(dma_low(np->put_rx_ctx->dma));
@@ -1866,6 +1877,7 @@ static int nv_alloc_rx_optimized(struct net_device *dev)
if (unlikely(np->put_rx_ctx++ == np->last_rx_ctx))
np->put_rx_ctx = np->first_rx_ctx;
} else {
+packet_dropped:
u64_stats_update_begin(&np->swstats_rx_syncp);
np->stat_rx_dropped++;
u64_stats_update_end(&np->swstats_rx_syncp);
@@ -2217,6 +2229,15 @@ static netdev_tx_t nv_start_xmit(struct sk_buff *skb, struct net_device *dev)
bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size;
np->put_tx_ctx->dma = pci_map_single(np->pci_dev, skb->data + offset, bcnt,
PCI_DMA_TODEVICE);
+ if (pci_dma_mapping_error(np->pci_dev,
+ np->put_tx_ctx->dma)) {
+ /* on DMA mapping error - drop the packet */
+ kfree_skb(skb);
+ u64_stats_update_begin(&np->swstats_tx_syncp);
+ np->stat_tx_dropped++;
+ u64_stats_update_end(&np->swstats_tx_syncp);
+ return NETDEV_TX_OK;
+ }
np->put_tx_ctx->dma_len = bcnt;
np->put_tx_ctx->dma_single = 1;
put_tx->buf = cpu_to_le32(np->put_tx_ctx->dma);
@@ -2337,6 +2358,15 @@ static netdev_tx_t nv_start_xmit_optimized(struct sk_buff *skb,
bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size;
np->put_tx_ctx->dma = pci_map_single(np->pci_dev, skb->data + offset, bcnt,
PCI_DMA_TODEVICE);
+ if (pci_dma_mapping_error(np->pci_dev,
+ np->put_tx_ctx->dma)) {
+ /* on DMA mapping error - drop the packet */
+ kfree_skb(skb);
+ u64_stats_update_begin(&np->swstats_tx_syncp);
+ np->stat_tx_dropped++;
+ u64_stats_update_end(&np->swstats_tx_syncp);
+ return NETDEV_TX_OK;
+ }
np->put_tx_ctx->dma_len = bcnt;
np->put_tx_ctx->dma_single = 1;
put_tx->bufhigh = cpu_to_le32(dma_high(np->put_tx_ctx->dma));
@@ -5003,6 +5033,11 @@ static int nv_loopback_test(struct net_device *dev)
test_dma_addr = pci_map_single(np->pci_dev, tx_skb->data,
skb_tailroom(tx_skb),
PCI_DMA_FROMDEVICE);
+ if (pci_dma_mapping_error(np->pci_dev,
+ test_dma_addr)) {
+ dev_kfree_skb_any(tx_skb);
+ goto out;
+ }
pkt_data = skb_put(tx_skb, pkt_len);
for (i = 0; i < pkt_len; i++)
pkt_data[i] = (u8)(i & 0xff);
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