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);
}
