From: Felix Fietkau <nbd@nbd.name>
To: linux-wireless@vger.kernel.org
Cc: kvalo@codeaurora.org
Subject: [PATCH 5.12 2/2] mt76: mt7915: only modify tx buffer list after allocating tx token id
Date: Tue, 16 Feb 2021 14:51:19 +0100 [thread overview]
Message-ID: <20210216135119.23809-2-nbd@nbd.name> (raw)
In-Reply-To: <20210216135119.23809-1-nbd@nbd.name>
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 --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;
}
--
2.28.0
next prev parent reply other threads:[~2021-02-16 13:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-16 13:51 [PATCH 5.12 1/2] mt76: fix tx skb error handling in mt76_dma_tx_queue_skb Felix Fietkau
2021-02-16 13:51 ` Felix Fietkau [this message]
2021-02-18 6:09 ` Kalle Valo
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