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wifi: mt76: handle possible mt76_rx_token_consume failures

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Take into account possible error conditions of mt76_rx_token_consume
routine in mt7915_mmio_wed_init_rx_buf() and mt76_dma_add_buf()

Fixes: cd372b8c99 ("wifi: mt76: add WED RX support to mt76_dma_{add,get}_buf")
Fixes: 4f831d18d1 ("wifi: mt76: mt7915: enable WED RX support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Lorenzo Bianconi 2022-12-08 11:46:40 +01:00 committed by Felix Fietkau
parent fe13dad899
commit 96f134dc19
3 changed files with 20 additions and 4 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/net/wireless/mediatek/mt76/dma.c
View file

@ -234,6 +234,9 @@ mt76_dma_add_buf(struct mt76_dev *dev, struct mt76_queue *q,
rx_token = mt76_rx_token_consume(dev, (void *)skb, t,
buf[0].addr);
if (rx_token < 0)
return -ENOMEM;
buf1 |= FIELD_PREP(MT_DMA_CTL_TOKEN, rx_token);
ctrl = FIELD_PREP(MT_DMA_CTL_SD_LEN0, buf[0].len) |
MT_DMA_CTL_TO_HOST;
@ -602,7 +605,12 @@ mt76_dma_rx_fill(struct mt76_dev *dev, struct mt76_queue *q)
qbuf.addr = addr + offset;
qbuf.len = len - offset;
qbuf.skip_unmap = false;
mt76_dma_add_buf(dev, q, &qbuf, 1, 0, buf, t);
if (mt76_dma_add_buf(dev, q, &qbuf, 1, 0, buf, t) < 0) {
dma_unmap_single(dev->dma_dev, addr, len,
DMA_FROM_DEVICE);
skb_free_frag(buf);
break;
}
frames++;
}

7
drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
View file

@ -653,6 +653,13 @@ static u32 mt7915_mmio_wed_init_rx_buf(struct mtk_wed_device *wed, int size)
desc->buf0 = cpu_to_le32(phy_addr);
token = mt76_rx_token_consume(&dev->mt76, ptr, t, phy_addr);
if (token < 0) {
dma_unmap_single(dev->mt76.dma_dev, phy_addr,
wed->wlan.rx_size, DMA_TO_DEVICE);
skb_free_frag(ptr);
goto unmap;
}
desc->token |= cpu_to_le32(FIELD_PREP(MT_DMA_CTL_TOKEN,
token));
desc++;

7
drivers/net/wireless/mediatek/mt76/tx.c
View file

@ -764,11 +764,12 @@ int mt76_rx_token_consume(struct mt76_dev *dev, void *ptr,
spin_lock_bh(&dev->rx_token_lock);
token = idr_alloc(&dev->rx_token, t, 0, dev->rx_token_size,
GFP_ATOMIC);
if (token >= 0) {
t->ptr = ptr;
t->dma_addr = phys;
}
spin_unlock_bh(&dev->rx_token_lock);
t->ptr = ptr;
t->dma_addr = phys;
return token;
}
EXPORT_SYMBOL_GPL(mt76_rx_token_consume);