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mt76: mt7663s: make all of packets 4-bytes aligned in sdio tx aggregation

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[ Upstream commit 455ae5aabcc72fed7e5c803d59d122415500dc08 ]

Each packet should be padded with the additional zero to become 4-bytes
alignment in sdio tx aggregation.

Fixes: 1522ff731f ("mt76: mt7663s: introduce sdio tx aggregation")
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Sean Wang 2021-03-04 21:25:22 +08:00 committed by Greg Kroah-Hartman
parent bf08637d32
commit 188dfc4702
1 changed files with 8 additions and 1 deletions
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9
drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c
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@ -195,6 +195,7 @@ static int mt7663s_tx_run_queue(struct mt76_dev *dev, enum mt76_txq_id qid)
int err, nframes = 0, len = 0, pse_sz = 0, ple_sz = 0;
struct mt76_queue *q = dev->q_tx[qid];
struct mt76_sdio *sdio = &dev->sdio;
u8 pad;
while (q->first != q->head) {
struct mt76_queue_entry *e = &q->entry[q->first];
@ -210,7 +211,8 @@ static int mt7663s_tx_run_queue(struct mt76_dev *dev, enum mt76_txq_id qid)
goto next;
}
if (len + e->skb->len + 4 > MT76S_XMIT_BUF_SZ)
pad = roundup(e->skb->len, 4) - e->skb->len;
if (len + e->skb->len + pad + 4 > MT76S_XMIT_BUF_SZ)
break;
if (mt7663s_tx_pick_quota(sdio, qid, e->buf_sz, &pse_sz,
@ -228,6 +230,11 @@ static int mt7663s_tx_run_queue(struct mt76_dev *dev, enum mt76_txq_id qid)
len += iter->len;
nframes++;
}
if (unlikely(pad)) {
memset(sdio->xmit_buf[qid] + len, 0, pad);
len += pad;
}
next:
q->first = (q->first + 1) % q->ndesc;
e->done = true;