diff options
| author | Ryder Lee <ryder.lee@mediatek.com> | 2019-04-01 09:16:42 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2019-05-01 13:03:59 +0200 |
| commit | 6edf07478da50ffbe64110391dada12bc1711f29 (patch) | |
| tree | 1b6c8dbb5556fb931bb1b6759231c73a2f5713e7 /drivers/net/wireless | |
| parent | mt76: add mac80211 driver for MT7615 PCIe-based chipsets (diff) | |
| download | linux-6edf07478da50ffbe64110391dada12bc1711f29.tar.xz linux-6edf07478da50ffbe64110391dada12bc1711f29.zip | |
mt76: add unlikely() for dma_mapping_error() check
In the tx/rx fastpath, the funciton dma_map_single() rarely fails.
This adds unlikely() optimization to this error check conditional.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/dma.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c index c629cb939719..4381155375e1 100644 --- a/drivers/net/wireless/mediatek/mt76/dma.c +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -272,7 +272,7 @@ mt76_dma_tx_queue_skb_raw(struct mt76_dev *dev, enum mt76_txq_id qid, addr = dma_map_single(dev->dev, skb->data, skb->len, DMA_TO_DEVICE); - if (dma_mapping_error(dev->dev, addr)) + if (unlikely(dma_mapping_error(dev->dev, addr))) return -ENOMEM; buf.addr = addr; @@ -315,7 +315,7 @@ mt76_dma_tx_queue_skb(struct mt76_dev *dev, enum mt76_txq_id qid, len = skb_headlen(skb); addr = dma_map_single(dev->dev, skb->data, len, DMA_TO_DEVICE); - if (dma_mapping_error(dev->dev, addr)) + if (unlikely(dma_mapping_error(dev->dev, addr))) goto free; tx_info.buf[n].addr = t->dma_addr; @@ -329,7 +329,7 @@ mt76_dma_tx_queue_skb(struct mt76_dev *dev, enum mt76_txq_id qid, addr = dma_map_single(dev->dev, iter->data, iter->len, DMA_TO_DEVICE); - if (dma_mapping_error(dev->dev, addr)) + if (unlikely(dma_mapping_error(dev->dev, addr))) goto unmap; tx_info.buf[n].addr = addr; @@ -386,7 +386,7 @@ mt76_dma_rx_fill(struct mt76_dev *dev, struct mt76_queue *q) break; addr = dma_map_single(dev->dev, buf, len, DMA_FROM_DEVICE); - if (dma_mapping_error(dev->dev, addr)) { + if (unlikely(dma_mapping_error(dev->dev, addr))) { skb_free_frag(buf); break; } |