Hardware wouldn't add LLC-SNAP when skb->data_len is 0, which causes Tx hang, so add a check to drop this kind of packet. Tested-by: Bo Jiao <bo.jiao@xxxxxxxxxxxx> Signed-off-by: Ryder Lee <ryder.lee@xxxxxxxxxxxx> --- drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c index f504eeb221f9..a2d63b7a346a 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c @@ -942,6 +942,9 @@ int mt7915_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr, int id, i, nbuf = tx_info->nbuf - 1; u8 *txwi = (u8 *)txwi_ptr; + if (unlikely(tx_info->skb->len <= ETH_HLEN)) + return -EINVAL; + if (!wcid) wcid = &dev->mt76.global_wcid; -- 2.18.0
