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ath10k: DMA related fixes for high latency devices 

Several DMA related functions (such as the dma_map_xxx functions)
are not used with high latency devices and don't need to be invoked
in this case.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Erik Stromdahl 2018-09-04 15:05:23 +03:00 committed by Kalle Valo
parent 4875e0b520
commit e66d536112
3 changed files with 16 additions and 9 deletions
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19
drivers/net/wireless/ath/ath10k/htc.c
View File

@ -53,7 +53,8 @@ static inline void ath10k_htc_restore_tx_skb(struct ath10k_htc *htc,
{
struct ath10k_skb_cb *skb_cb = ATH10K_SKB_CB(skb);
dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
if (htc->ar->dev_type != ATH10K_DEV_TYPE_HL)
dma_unmap_single(htc->ar->dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
skb_pull(skb, sizeof(struct ath10k_htc_hdr));
}
@ -137,11 +138,14 @@ int ath10k_htc_send(struct ath10k_htc *htc,
ath10k_htc_prepare_tx_skb(ep, skb);
skb_cb->eid = eid;
skb_cb->paddr = dma_map_single(dev, skb->data, skb->len, DMA_TO_DEVICE);
ret = dma_mapping_error(dev, skb_cb->paddr);
if (ret) {
ret = -EIO;
goto err_credits;
if (ar->dev_type != ATH10K_DEV_TYPE_HL) {
skb_cb->paddr = dma_map_single(dev, skb->data, skb->len,
DMA_TO_DEVICE);
ret = dma_mapping_error(dev, skb_cb->paddr);
if (ret) {
ret = -EIO;
goto err_credits;
}
}
sg_item.transfer_id = ep->eid;
@ -157,7 +161,8 @@ int ath10k_htc_send(struct ath10k_htc *htc,
return 0;
err_unmap:
dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
if (ar->dev_type != ATH10K_DEV_TYPE_HL)
dma_unmap_single(dev, skb_cb->paddr, skb->len, DMA_TO_DEVICE);
err_credits:
if (ep->tx_credit_flow_enabled) {
spin_lock_bh(&htc->tx_lock);

3
drivers/net/wireless/ath/ath10k/htt_tx.c
View File

@ -1123,7 +1123,8 @@ int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu)
return 0;
err_unmap_msdu:
dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
if (ar->dev_type != ATH10K_DEV_TYPE_HL)
dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
err_free_txdesc:
dev_kfree_skb_any(txdesc);
err_free_msdu_id:

3
drivers/net/wireless/ath/ath10k/txrx.c
View File

@ -95,7 +95,8 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
wake_up(&htt->empty_tx_wq);
spin_unlock_bh(&htt->tx_lock);
dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
if (ar->dev_type != ATH10K_DEV_TYPE_HL)
dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);
ath10k_report_offchan_tx(htt->ar, msdu);