Shengyu Qu <wiagn233@xxxxxxxxxxx> wrote: > The token id in RxDMAD may be incorrect when it is not the last frame > due to WED HW bug. Lookup correct token id by physical address in sdp0. > > Downstream patch link: > https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/737340322ab22b138fd200e02 > 0d61ffdbe3e36a9/autobuild/autobuild_5.4_mac80211_release/mt7988_wifi7_mac80211_mlo/package/kernel/mt76 > /patches/0062-mtk-wifi-mt76-mt7915-wed-find-rx-token-by-physical-a.patch > > Signed-off-by: Peter Chiu <chui-hao.chiu@xxxxxxxxxxxx> > Signed-off-by: Shengyu Qu <wiagn233@xxxxxxxxxxx> > --- > Changes since v1: > - Reordered code sequence to reversed Xmas tree order > - Renamed some variables > --- > drivers/net/wireless/mediatek/mt76/dma.c | 26 +++++++++++++++++++++++- > 1 file changed, 25 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c > index 844af16ee5513..25893686cbe85 100644 > --- a/drivers/net/wireless/mediatek/mt76/dma.c > +++ b/drivers/net/wireless/mediatek/mt76/dma.c > @@ -445,8 +445,32 @@ mt76_dma_get_buf(struct mt76_dev *dev, struct mt76_queue *q, int idx, > > if (mt76_queue_is_wed_rx(q)) { > u32 token = FIELD_GET(MT_DMA_CTL_TOKEN, buf1); > - struct mt76_txwi_cache *t = mt76_rx_token_release(dev, token); > + struct mt76_txwi_cache *t; > + bool found = false; > + u32 id; > + > + if (*more) { > + spin_lock_bh(&dev->rx_token_lock); > + > + idr_for_each_entry(&dev->rx_token, t, id) { > + if (t->dma_addr == le32_to_cpu(desc->buf0)) { > + token = id; > + found = 1; found = true; Since you are digging how frequent this can occur, you may decide to have a conversion function afterward, so it would be good to move this loop into a function, like mt76_dma_get_id_from_txwi(dev, t). Then the you can replace the implementation at that time. By the way, I personally don't like so many indents. A function can ease indents. > + > + /* Write correct id back to DMA*/ > + u32p_replace_bits(&buf1, id, > + MT_DMA_CTL_TOKEN); > + WRITE_ONCE(desc->buf1, cpu_to_le32(buf1)); > + break; > + } > + } > + > + spin_unlock_bh(&dev->rx_token_lock); > + if (!found) > + return NULL; > + } > > + t = mt76_rx_token_release(dev, token); > if (!t) > return NULL; > > -- > 2.48.1
