Merge remote-tracking branch 'spi/fix/rockchip' into spi-linus

drivers/spi/spi-rockchip.c

@@ -415,7 +415,7 @@ static void rockchip_spi_dma_txcb(void *data)
 	spin_unlock_irqrestore(&rs->lock, flags);
 }
 
-static int rockchip_spi_dma_transfer(struct rockchip_spi *rs)
+static void rockchip_spi_prepare_dma(struct rockchip_spi *rs)
 {
 	unsigned long flags;
 	struct dma_slave_config rxconf, txconf;
@@ -474,8 +474,6 @@ static int rockchip_spi_dma_transfer(struct rockchip_spi *rs)
 		dmaengine_submit(txdesc);
 		dma_async_issue_pending(rs->dma_tx.ch);
 	}
-
-	return 1;
 }
 
 static void rockchip_spi_config(struct rockchip_spi *rs)
@@ -557,16 +555,17 @@ static int rockchip_spi_transfer_one(
 	else if (rs->rx)
 		rs->tmode = CR0_XFM_RO;
 
-	if (master->can_dma && master->can_dma(master, spi, xfer))
+	/* we need prepare dma before spi was enabled */
+	if (master->can_dma && master->can_dma(master, spi, xfer)) {
 		rs->use_dma = 1;
-	else
+		rockchip_spi_prepare_dma(rs);
+	} else {
 		rs->use_dma = 0;
+	}
 
 	rockchip_spi_config(rs);
 
-	if (rs->use_dma)
-		ret = rockchip_spi_dma_transfer(rs);
-	else
+	if (!rs->use_dma)
 		ret = rockchip_spi_pio_transfer(rs);
 
 	return ret;