On Mon, 19 Oct 2020 10:54:20 +0800 Jia-Ju Bai wrote: > + if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { > + if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) > + priv->seqno += 0x10; > + hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); > + hdr->seq_ctrl |= cpu_to_le16(priv->seqno); > + } > + > mapping = dma_map_single(&priv->pdev->dev, skb->data, skb->len, > DMA_TO_DEVICE); > > @@ -534,13 +541,6 @@ static void rtl8180_tx(struct ieee80211_hw *dev, > > spin_lock_irqsave(&priv->lock, flags); > > - if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { > - if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) > - priv->seqno += 0x10; You're taking the priv->seqno access and modification from under priv->lock. Is that okay?