From aafe972e95b2246a65eea2fb8b9ede9e45f490e3 Mon Sep 17 00:00:00 2001 From: Sean Wang Date: Thu, 4 Mar 2021 21:25:22 +0800 Subject: [PATCH] mt76: mt7663s: make all of packets 4-bytes aligned in sdio tx aggregation Each packet should be padded with the additional zero to become 4-bytes alignment in sdio tx aggregation. Fixes: 1522ff731f84 ("mt76: mt7663s: introduce sdio tx aggregation") Signed-off-by: Sean Wang Signed-off-by: Felix Fietkau --- mt7615/sdio_txrx.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/mt7615/sdio_txrx.c b/mt7615/sdio_txrx.c index 9fb506f2..37fe65ce 100644 --- a/mt7615/sdio_txrx.c +++ b/mt7615/sdio_txrx.c @@ -218,6 +218,7 @@ static int mt7663s_tx_run_queue(struct mt76_dev *dev, struct mt76_queue *q) int qid, err, nframes = 0, len = 0, pse_sz = 0, ple_sz = 0; bool mcu = q == dev->q_mcu[MT_MCUQ_WM]; struct mt76_sdio *sdio = &dev->sdio; + u8 pad; qid = mcu ? ARRAY_SIZE(sdio->xmit_buf) - 1 : q->qid; while (q->first != q->head) { @@ -234,7 +235,8 @@ static int mt7663s_tx_run_queue(struct mt76_dev *dev, struct mt76_queue *q) 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, mcu, e->buf_sz, &pse_sz, @@ -252,6 +254,11 @@ static int mt7663s_tx_run_queue(struct mt76_dev *dev, struct mt76_queue *q) 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;