[PATCH 5.10 302/717] mt76: mt7663s: fix a possible ple quota underflow

[Greg Kroah-Hartman]

From: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>

[ Upstream commit 1c79a190e94325e01811f653f770a34e816fdd8f ]

Properly account current consumed ple quota in mt7663s_tx_pick_quota
routine and avoid possible underflow.

Fixes: 6ef2d665f64d ("mt76: mt7663s: split mt7663s_tx_update_sched in mt7663s_tx_{pick,update}_quota")
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c b/drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c
index 2486cda3243bc..69e38f477b1e4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/sdio_txrx.c
@@ -150,7 +150,7 @@ static int mt7663s_tx_pick_quota(struct mt76_sdio *sdio, enum mt76_txq_id qid,
 			return -EBUSY;
 	} else {
 		if (sdio->sched.pse_data_quota < *pse_size + pse_sz ||
-		    sdio->sched.ple_data_quota < *ple_size)
+		    sdio->sched.ple_data_quota < *ple_size + 1)
 			return -EBUSY;
 
 		*ple_size = *ple_size + 1;
-- 
2.27.0