From: StanleyYP Wang Add the missing rdd idx check (< 0) in mt7996_mcu_rdd_background_enable(). mt7996_get_rdd_idx() returns -1 for phys without 5 GHz support, and the negative index was passed to the RDD MCU command unchecked. Fixes: 1529e335f93d ("wifi: mt76: mt7996: rework radar HWRDD idx") Signed-off-by: StanleyYP Wang Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/mt7996/mcu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c index 1b334cbf6d72..09fcddb8e21d 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/mcu.c @@ -4016,6 +4016,9 @@ int mt7996_mcu_rdd_background_enable(struct mt7996_phy *phy, struct mt7996_dev *dev = phy->dev; int err, region, rdd_idx = mt7996_get_rdd_idx(phy, true); + if (rdd_idx < 0) + return -EINVAL; + if (!chandef) { /* disable offchain */ err = mt7996_mcu_rdd_cmd(dev, RDD_STOP, rdd_idx, 0); if (err) -- 2.53.0