6.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Deren Wu <deren.wu@xxxxxxxxxxxx>
commit d616d3680264beb9a9d2c4fc681064b06f447eeb upstream.
mt7921 support following antenna combiantions only.
* primary + secondary (2x2)
* primary only (1x1)
Since we cannot work on secondary antenna only, return error if the
antenna bitmap is 0x2 in .set_antenna().
For example:
iw phy0 set antenna 3 3 /* valid */
iw phy0 set antenna 1 1 /* valid */
iw phy0 set antenna 2 2 /* invalid */
Cc: stable@xxxxxxxxxxxxxxx
Fixes: e0f9fdda81bd ("mt76: mt7921: add ieee80211_ops")
Suggested-by: Knox Chiou <knoxchiou@xxxxxxxxxx>
Signed-off-by: Deren Wu <deren.wu@xxxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/mediatek/mt76/mt7921/main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -1363,7 +1363,7 @@ mt7921_set_antenna(struct ieee80211_hw *
return -EINVAL;
if ((BIT(hweight8(tx_ant)) - 1) != tx_ant)
- tx_ant = BIT(ffs(tx_ant) - 1) - 1;
+ return -EINVAL;
mt7921_mutex_acquire(dev);
