mt76x0: disable usb rx bulk aggregation

In order to use zero-copying, disable usb rx bulk aggregation
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x0/init.c

@@ -109,17 +109,17 @@ static void mt76x0_reset_csr_bbp(struct mt76x0_dev *dev)
 
 static void mt76x0_init_usb_dma(struct mt76x0_dev *dev)
 {
-	struct mt76_usb *usb = &dev->mt76.usb;
 	u32 val;
 
 	val = mt76_rr(dev, MT_USB_DMA_CFG);
 
-	val |= FIELD_PREP(MT_USB_DMA_CFG_RX_BULK_AGG_TOUT, MT_USB_AGGR_TIMEOUT) |
-	       FIELD_PREP(MT_USB_DMA_CFG_RX_BULK_AGG_LMT, MT_USB_AGGR_SIZE_LIMIT) |
-	       MT_USB_DMA_CFG_RX_BULK_EN |
+	val |= MT_USB_DMA_CFG_RX_BULK_EN |
 	       MT_USB_DMA_CFG_TX_BULK_EN;
-	if (usb->in_max_packet == 512)
-		val |= MT_USB_DMA_CFG_RX_BULK_AGG_EN;
+
+	/* disable AGGR_BULK_RX in order to receive one
+	 * frame in each rx urb and avoid copies
+	 */
+	val &= ~MT_USB_DMA_CFG_RX_BULK_AGG_EN;
 	mt76_wr(dev, MT_USB_DMA_CFG, val);
 
 	val = mt76_rr(dev, MT_COM_REG0);