wil6210: avoid Tx descriptor double write
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>
diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 24c4b9a..e37cab1 100644
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -981,8 +981,6 @@
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 @@
&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 @@
* 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);