This is a note to let you know that I've just added the patch titled mt76: mt7615: fix tx skb dma unmap to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mt76-mt7615-fix-tx-skb-dma-unmap.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 41527cd8ae95309c42e2ac3f70902acfe5ea65b1 Author: Felix Fietkau <nbd@xxxxxxxx> Date: Sat Feb 13 18:42:15 2021 +0100 mt76: mt7615: fix tx skb dma unmap [ Upstream commit ebee7885bb12a8fe2c2f9bac87dbd87a05b645f9 ] The first pointer in the txp needs to be unmapped as well, otherwise it will leak DMA mapping entries Fixes: 27d5c528a7ca ("mt76: fix double DMA unmap of the first buffer on 7615/7915") Signed-off-by: Felix Fietkau <nbd@xxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c index 8c66ad943b4d..f479012ab52c 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c @@ -688,7 +688,7 @@ mt7615_txp_skb_unmap_fw(struct mt76_dev *dev, struct mt7615_fw_txp *txp) { int i; - for (i = 1; i < txp->nbuf; i++) + for (i = 0; i < txp->nbuf; i++) dma_unmap_single(dev->dev, le32_to_cpu(txp->buf[i]), le16_to_cpu(txp->len[i]), DMA_TO_DEVICE); }