acenic: fix the misusage of zero dma address
acenic wrongly assumes that zero is an invalid dma address (calls
dma_unmap_page for only non zero dma addresses). Zero is a valid dma
address on some architectures. The dma length can be used here.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/acenic.c b/drivers/net/acenic.c
index 4ae750e..e52cc3b 100644
--- a/drivers/net/acenic.c
+++ b/drivers/net/acenic.c
@@ -2077,18 +2077,16 @@
do {
struct sk_buff *skb;
- dma_addr_t mapping;
struct tx_ring_info *info;
info = ap->skb->tx_skbuff + idx;
skb = info->skb;
- mapping = pci_unmap_addr(info, mapping);
- if (mapping) {
- pci_unmap_page(ap->pdev, mapping,
+ if (dma_unmap_len(info, maplen)) {
+ pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping),
pci_unmap_len(info, maplen),
PCI_DMA_TODEVICE);
- pci_unmap_addr_set(info, mapping, 0);
+ dma_unmap_len_set(info, maplen, 0);
}
if (skb) {
@@ -2376,14 +2374,12 @@
for (i = 0; i < ACE_TX_RING_ENTRIES(ap); i++) {
struct sk_buff *skb;
- dma_addr_t mapping;
struct tx_ring_info *info;
info = ap->skb->tx_skbuff + i;
skb = info->skb;
- mapping = pci_unmap_addr(info, mapping);
- if (mapping) {
+ if (dma_unmap_len(info, maplen)) {
if (ACE_IS_TIGON_I(ap)) {
/* NB: TIGON_1 is special, tx_ring is in io space */
struct tx_desc __iomem *tx;
@@ -2394,10 +2390,10 @@
} else
memset(ap->tx_ring + i, 0,
sizeof(struct tx_desc));
- pci_unmap_page(ap->pdev, mapping,
+ pci_unmap_page(ap->pdev, dma_unmap_addr(info, mapping),
pci_unmap_len(info, maplen),
PCI_DMA_TODEVICE);
- pci_unmap_addr_set(info, mapping, 0);
+ dma_unmap_len_set(info, maplen, 0);
}
if (skb) {
dev_kfree_skb(skb);