diff options
| author | Andi Kleen <ak@suse.de> | 2006-05-15 18:19:35 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-05-16 07:59:31 -0700 |
| commit | 639b421b911bbde1e3fb5ed037a4f8c85a5bffcb (patch) | |
| tree | 31522e82cffe76cc13bd2f6db68d74bcbd526f53 | |
| parent | c4694c76ce28dd7e415b4f3014d8c6e580b5f3d2 (diff) | |
[PATCH] x86_64: Check for bad dma address in b44 1GB DMA workaround
Needed for interaction with the nommu code in x86-64 which
will return bad_dma_address if the address exceeds dma_mask.
Cc: netdev@vger.kernel.org
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/net/b44.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/drivers/net/b44.c b/drivers/net/b44.c index 3d306681919..d8233e0b789 100644 --- a/drivers/net/b44.c +++ b/drivers/net/b44.c @@ -650,9 +650,11 @@ static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked) /* Hardware bug work-around, the chip is unable to do PCI DMA to/from anything above 1GB :-( */ - if (mapping + RX_PKT_BUF_SZ > B44_DMA_MASK) { + if (dma_mapping_error(mapping) || + mapping + RX_PKT_BUF_SZ > B44_DMA_MASK) { /* Sigh... */ - pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE); + if (!dma_mapping_error(mapping)) + pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE); dev_kfree_skb_any(skb); skb = __dev_alloc_skb(RX_PKT_BUF_SZ,GFP_DMA); if (skb == NULL) @@ -660,8 +662,10 @@ static int b44_alloc_rx_skb(struct b44 *bp, int src_idx, u32 dest_idx_unmasked) mapping = pci_map_single(bp->pdev, skb->data, RX_PKT_BUF_SZ, PCI_DMA_FROMDEVICE); - if (mapping + RX_PKT_BUF_SZ > B44_DMA_MASK) { - pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE); + if (dma_mapping_error(mapping) || + mapping + RX_PKT_BUF_SZ > B44_DMA_MASK) { + if (!dma_mapping_error(mapping)) + pci_unmap_single(bp->pdev, mapping, RX_PKT_BUF_SZ,PCI_DMA_FROMDEVICE); dev_kfree_skb_any(skb); return -ENOMEM; } @@ -967,9 +971,10 @@ static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev) } mapping = pci_map_single(bp->pdev, skb->data, len, PCI_DMA_TODEVICE); - if (mapping + len > B44_DMA_MASK) { + if (dma_mapping_error(mapping) || mapping + len > B44_DMA_MASK) { /* Chip can't handle DMA to/from >1GB, use bounce buffer */ - pci_unmap_single(bp->pdev, mapping, len, PCI_DMA_TODEVICE); + if (!dma_mapping_error(mapping)) + pci_unmap_single(bp->pdev, mapping, len, PCI_DMA_TODEVICE); bounce_skb = __dev_alloc_skb(TX_PKT_BUF_SZ, GFP_ATOMIC|GFP_DMA); @@ -978,8 +983,9 @@ static int b44_start_xmit(struct sk_buff *skb, struct net_device *dev) mapping = pci_map_single(bp->pdev, bounce_skb->data, len, PCI_DMA_TODEVICE); - if (mapping + len > B44_DMA_MASK) { - pci_unmap_single(bp->pdev, mapping, + if (dma_mapping_error(mapping) || mapping + len > B44_DMA_MASK) { + if (!dma_mapping_error(mapping)) + pci_unmap_single(bp->pdev, mapping, len, PCI_DMA_TODEVICE); dev_kfree_skb_any(bounce_skb); goto err_out; @@ -1203,7 +1209,8 @@ static int b44_alloc_consistent(struct b44 *bp) DMA_TABLE_BYTES, DMA_BIDIRECTIONAL); - if (rx_ring_dma + size > B44_DMA_MASK) { + if (dma_mapping_error(rx_ring_dma) || + rx_ring_dma + size > B44_DMA_MASK) { kfree(rx_ring); goto out_err; } @@ -1229,7 +1236,8 @@ static int b44_alloc_consistent(struct b44 *bp) DMA_TABLE_BYTES, DMA_TO_DEVICE); - if (tx_ring_dma + size > B44_DMA_MASK) { + if (dma_mapping_error(tx_ring_dma) || + tx_ring_dma + size > B44_DMA_MASK) { kfree(tx_ring); goto out_err; } |