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cns3xxx: ethernet: use circular queue checks consistently 

Use the same method for setting queue index pointers consistenly
throughout the source file.

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
openwrt-19.07
Koen Vandeputte 2018-08-07 11:44:36 +02:00
parent 06beefd6d5
commit 0d283c0180
1 changed files with 18 additions and 15 deletions
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33
target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c
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@ -595,21 +595,23 @@ static void eth_complete_tx(struct sw *sw)
desc = &(tx_ring)->desc[index];
for (i = 0; i < num_used; i++) {
if (desc->cown) {
skb = tx_ring->buff_tab[index];
tx_ring->buff_tab[index] = 0;
if (skb)
dev_kfree_skb_any(skb);
dma_unmap_single(sw->dev, tx_ring->phys_tab[index],
desc->sdl, DMA_TO_DEVICE);
if (++index == TX_DESCS) {
index = 0;
desc = &(tx_ring)->desc[index];
} else {
desc++;
}
} else {
if (!desc->cown)
break;
skb = tx_ring->buff_tab[index];
tx_ring->buff_tab[index] = 0;
if (skb)
dev_kfree_skb_any(skb);
dma_unmap_single(sw->dev, tx_ring->phys_tab[index], desc->sdl, DMA_TO_DEVICE);
if (index == TX_DESCS - 1) {
index = 0;
desc = &(tx_ring)->desc[index];
} else {
index++;
desc++;
}
}
@ -705,10 +707,11 @@ static int eth_poll(struct napi_struct *napi, int budget)
}
received++;
if (++i == RX_DESCS) {
if (i == RX_DESCS - 1) {
i = 0;
desc = &(rx_ring)->desc[i];
} else {
i++;
desc++;
}
}