diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index 14f60fcb6a34..4029a2217397 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -507,7 +507,7 @@ struct mt76_sdio {
 
 	struct work_struct stat_work;
 
-	u8 *xmit_buf[IEEE80211_NUM_ACS + 2];
+	u8 *xmit_buf;
 
 	struct sdio_func *func;
 	void *intr_data;
diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/sdio.c b/drivers/net/wireless/mediatek/mt76/mt7615/sdio.c
index 71162befdae8..554160b0ea9a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/sdio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/sdio.c
@@ -101,7 +101,7 @@ static int mt7663s_probe(struct sdio_func *func,
 	struct ieee80211_ops *ops;
 	struct mt7615_dev *dev;
 	struct mt76_dev *mdev;
-	int i, ret;
+	int ret;
 
 	ops = devm_kmemdup(&func->dev, &mt7615_ops, sizeof(mt7615_ops),
 			   GFP_KERNEL);
@@ -140,14 +140,11 @@ static int mt7663s_probe(struct sdio_func *func,
 		goto error;
 	}
 
-	for (i = 0; i < ARRAY_SIZE(mdev->sdio.xmit_buf); i++) {
-		mdev->sdio.xmit_buf[i] = devm_kmalloc(mdev->dev,
-						      MT76S_XMIT_BUF_SZ,
-						      GFP_KERNEL);
-		if (!mdev->sdio.xmit_buf[i]) {
-			ret = -ENOMEM;
-			goto error;
-		}
+	mdev->sdio.xmit_buf = devm_kmalloc(mdev->dev, MT76S_XMIT_BUF_SZ,
+					   GFP_KERNEL);
+	if (!mdev->sdio.xmit_buf) {
+		ret = -ENOMEM;
+		goto error;
 	}
 
 	ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MAIN);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c b/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c
index 743b63f66efa..c58c14e28430 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/sdio.c
@@ -121,7 +121,7 @@ static int mt7921s_probe(struct sdio_func *func,
 
 	struct mt7921_dev *dev;
 	struct mt76_dev *mdev;
-	int ret, i;
+	int ret;
 
 	mdev = mt76_alloc_device(&func->dev, sizeof(*dev), &mt7921_ops,
 				 &drv_ops);
@@ -154,14 +154,11 @@ static int mt7921s_probe(struct sdio_func *func,
 		goto error;
 	}
 
-	for (i = 0; i < ARRAY_SIZE(mdev->sdio.xmit_buf); i++) {
-		mdev->sdio.xmit_buf[i] = devm_kmalloc(mdev->dev,
-						      MT76S_XMIT_BUF_SZ,
-						      GFP_KERNEL);
-		if (!mdev->sdio.xmit_buf[i]) {
-			ret = -ENOMEM;
-			goto error;
-		}
+	mdev->sdio.xmit_buf = devm_kmalloc(mdev->dev, MT76S_XMIT_BUF_SZ,
+					   GFP_KERNEL);
+	if (!mdev->sdio.xmit_buf) {
+		ret = -ENOMEM;
+		goto error;
 	}
 
 	ret = mt76s_alloc_rx_queue(mdev, MT_RXQ_MAIN);
diff --git a/drivers/net/wireless/mediatek/mt76/sdio_txrx.c b/drivers/net/wireless/mediatek/mt76/sdio_txrx.c
index 488ad7734d85..a04cd2444247 100644
--- a/drivers/net/wireless/mediatek/mt76/sdio_txrx.c
+++ b/drivers/net/wireless/mediatek/mt76/sdio_txrx.c
@@ -229,12 +229,11 @@ static int __mt76s_xmit_queue(struct mt76_dev *dev, u8 *data, int len)
 
 static int mt76s_tx_run_queue(struct mt76_dev *dev, struct mt76_queue *q)
 {
-	int qid, err, nframes = 0, len = 0, pse_sz = 0, ple_sz = 0;
+	int err, nframes = 0, len = 0, pse_sz = 0, ple_sz = 0;
 	bool mcu = q == dev->q_mcu[MT_MCUQ_WM];
 	struct mt76_sdio *sdio = &dev->sdio;
 	u8 pad;
 
-	qid = mcu ? ARRAY_SIZE(sdio->xmit_buf) - 1 : q->qid;
 	while (q->first != q->head) {
 		struct mt76_queue_entry *e = &q->entry[q->first];
 		struct sk_buff *iter;
@@ -262,20 +261,18 @@ static int mt76s_tx_run_queue(struct mt76_dev *dev, struct mt76_queue *q)
 					&ple_sz))
 			break;
 
-		memcpy(sdio->xmit_buf[qid] + len, e->skb->data,
-		       skb_headlen(e->skb));
+		memcpy(sdio->xmit_buf + len, e->skb->data, skb_headlen(e->skb));
 		len += skb_headlen(e->skb);
 		nframes++;
 
 		skb_walk_frags(e->skb, iter) {
-			memcpy(sdio->xmit_buf[qid] + len, iter->data,
-			       iter->len);
+			memcpy(sdio->xmit_buf + len, iter->data, iter->len);
 			len += iter->len;
 			nframes++;
 		}
 
 		if (unlikely(pad)) {
-			memset(sdio->xmit_buf[qid] + len, 0, pad);
+			memset(sdio->xmit_buf + len, 0, pad);
 			len += pad;
 		}
 next:
@@ -284,8 +281,8 @@ static int mt76s_tx_run_queue(struct mt76_dev *dev, struct mt76_queue *q)
 	}
 
 	if (nframes) {
-		memset(sdio->xmit_buf[qid] + len, 0, 4);
-		err = __mt76s_xmit_queue(dev, sdio->xmit_buf[qid], len + 4);
+		memset(sdio->xmit_buf + len, 0, 4);
+		err = __mt76s_xmit_queue(dev, sdio->xmit_buf, len + 4);
 		if (err)
 			return err;
 	}
