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wifi: mt76: mt7921: do not support one stream on secondary antenna only

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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@vger.kernel.org
Fixes: e0f9fdda81bd ("mt76: mt7921: add ieee80211_ops")
Suggested-by: Knox Chiou <knoxchiou@google.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Deren Wu 2023-05-10 14:51:13 +08:00 committed by Greg Kroah-Hartman
parent a5c2a467e9
commit 46d13013b5
1 changed files with 1 additions and 1 deletions

2
drivers/net/wireless/mediatek/mt76/mt7921/main.c

@ -994,7 +994,7 @@ mt7921_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
return -EINVAL;
if ((BIT(hweight8(tx_ant)) - 1) != tx_ant)
tx_ant = BIT(ffs(tx_ant) - 1) - 1;
return -EINVAL;
mt7921_mutex_acquire(dev);