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wil6210: avoid Tx descriptor double write

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Non-cacheable Tx descriptor for the last fragment of
multi-fragment frame used to be written back twice.

Refactor code to always write non-cacheable descriptor
only once

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Vladimir Kondratiev 2015-02-01 10:55:12 +02:00 committed by Kalle Valo
parent a3c7490208
commit e59d16c08b
1 changed files with 1 additions and 3 deletions
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4
drivers/net/wireless/ath/wil6210/txrx.c
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@ -981,8 +981,6 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
vring->ctx[i].nr_frags = nr_frags;
wil_tx_desc_set_nr_frags(d, nr_frags);
if (nr_frags)
*_d = *d;
/* middle segments */
for (; f < nr_frags; f++) {
@ -990,6 +988,7 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
&skb_shinfo(skb)->frags[f];
int len = skb_frag_size(frag);
*_d = *d;
i = (swhead + f + 1) % vring->size;
_d = &vring->va[i].tx;
pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag),
@ -1003,7 +1002,6 @@ static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring,
* it will succeed here too
*/
wil_tx_desc_offload_cksum_set(wil, d, skb);
*_d = *d;
}
/* for the last seg only */
d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS);