[PATCH rtw-next v2 03/14] wifi: rtw89: allow two station interfaces in SCC

[Ping-Ke Shih <pkshih@realtek.com>]

From: Hsiao-Yung Chen <henchy.chen@realtek.com>

The single-channel interface combination previously permitted only one
STATION interface, alongside one P2P or AP interface. Raise the STATION
limit to two so that a STA + STA combination is allowed in the single
channel concurrency (SCC) case.

This enables concurrent dual-STA use cases on the same channel, such as
having one STA interface connected to an AP router for Internet access,
while the second STA interface connects to another local peer/device for
dedicated media/data streaming.

Benchmark results on RTL8922DE in 6 GHz / 80 MHz SCC mode (UDP):

                STA1 alone      SCC STA1+STA2   STA2 alone
UDP TX (Gbps)   0.95            0.52 + 0.49     0.99
UDP RX (Gbps)   0.95            0.56 + 0.46     0.95

Signed-off-by: Hsiao-Yung Chen <henchy.chen@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c
index 397ebbfcac09..24275c2250e7 100644
--- a/drivers/net/wireless/realtek/rtw89/core.c
+++ b/drivers/net/wireless/realtek/rtw89/core.c
@@ -167,7 +167,7 @@ static struct ieee80211_rate rtw89_bitrates[] = {
 
 static const struct ieee80211_iface_limit rtw89_iface_limits[] = {
 	{
-		.max = 1,
+		.max = 2,
 		.types = BIT(NL80211_IFTYPE_STATION),
 	},
 	{
-- 
2.25.1