diff mbox series

[5.12,2/2] mt76: mt7915: only modify tx buffer list after allocating tx token id

Message ID 20210216135119.23809-2-nbd@nbd.name
State New
Headers show
Series [5.12,1/2] mt76: fix tx skb error handling in mt76_dma_tx_queue_skb | expand

Commit Message

Felix Fietkau Feb. 16, 2021, 1:51 p.m. UTC 
Modifying the tx buffer list too early can leak DMA mappings

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index eb889f8d6fea..e5a258958ac9 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -967,11 +967,6 @@  int mt7915_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
 	}
 	txp->nbuf = nbuf;
 
-	/* pass partial skb header to fw */
-	tx_info->buf[1].len = MT_CT_PARSE_LEN;
-	tx_info->buf[1].skip_unmap = true;
-	tx_info->nbuf = MT_CT_DMA_BUF_NUM;
-
 	txp->flags = cpu_to_le16(MT_CT_INFO_APPLY_TXD | MT_CT_INFO_FROM_HOST);
 
 	if (!key)
@@ -1009,6 +1004,11 @@  int mt7915_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
 		txp->rept_wds_wcid = cpu_to_le16(0x3ff);
 	tx_info->skb = DMA_DUMMY_DATA;
 
+	/* pass partial skb header to fw */
+	tx_info->buf[1].len = MT_CT_PARSE_LEN;
+	tx_info->buf[1].skip_unmap = true;
+	tx_info->nbuf = MT_CT_DMA_BUF_NUM;
+
 	return 0;
 }