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wifi: mt76: mt7925: prevent NULL vif dereference in mt7925_mac_write_txwi

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Check for a NULL `vif` before accessing `ieee80211_vif_is_mld(vif)` to
avoid a potential kernel panic in scenarios where `vif` might not be
initialized.

Fixes: ebb1406813c6 ("wifi: mt76: mt7925: add link handling to txwi")
Signed-off-by: Ming Yen Hsieh <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Ming Yen Hsieh
2025-09-09 07:19:41 +02:00
committed by Felix Fietkau
parent f271ce48d7
commit d48b221e39
1 changed files with 2 additions and 2 deletions
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mt7925/mac.c
+2 -2
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@@ -802,8 +802,8 @@ mt7925_mac_write_txwi(struct mt76_dev *dev, __le32 *txwi,
txwi[5] = cpu_to_le32(val); txwi[5] = cpu_to_le32(val);
val = MT_TXD6_DAS | FIELD_PREP(MT_TXD6_MSDU_CNT, 1); val = MT_TXD6_DAS | FIELD_PREP(MT_TXD6_MSDU_CNT, 1);
if (!ieee80211_vif_is_mld(vif) || if (vif && (!ieee80211_vif_is_mld(vif) ||
(q_idx >= MT_LMAC_ALTX0 && q_idx <= MT_LMAC_BCN0)) (q_idx >= MT_LMAC_ALTX0 && q_idx <= MT_LMAC_BCN0)))
val |= MT_TXD6_DIS_MAT; val |= MT_TXD6_DIS_MAT;
txwi[6] = cpu_to_le32(val); txwi[6] = cpu_to_le32(val);
txwi[7] = 0; txwi[7] = 0;