spi: s3c64xx: simplify if statement in prepare_transfer function

The whole function is inside an 'if' statement
("!is_polling(sdd)").

Check the opposite of that statement at the beginning and exit,
this way we can have one level less of indentation.

Remove the goto paths as they are redundant.
Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-s3c64xx.c

@@ -341,38 +341,32 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi)
 	dma_filter_fn filter = sdd->cntrlr_info->filter;
 	struct device *dev = &sdd->pdev->dev;
 	dma_cap_mask_t mask;
-	int ret;
 
-	if (!is_polling(sdd)) {
-		dma_cap_zero(mask);
-		dma_cap_set(DMA_SLAVE, mask);
-
-		/* Acquire DMA channels */
-		sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter,
-				   sdd->cntrlr_info->dma_rx, dev, "rx");
-		if (!sdd->rx_dma.ch) {
-			dev_err(dev, "Failed to get RX DMA channel\n");
-			ret = -EBUSY;
-			goto out;
-		}
-		spi->dma_rx = sdd->rx_dma.ch;
-
-		sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter,
-				   sdd->cntrlr_info->dma_tx, dev, "tx");
-		if (!sdd->tx_dma.ch) {
-			dev_err(dev, "Failed to get TX DMA channel\n");
-			ret = -EBUSY;
-			goto out_rx;
-		}
-		spi->dma_tx = sdd->tx_dma.ch;
+	if (is_polling(sdd))
+		return 0;
+
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+
+	/* Acquire DMA channels */
+	sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter,
+			   sdd->cntrlr_info->dma_rx, dev, "rx");
+	if (!sdd->rx_dma.ch) {
+		dev_err(dev, "Failed to get RX DMA channel\n");
+		return -EBUSY;
 	}
+	spi->dma_rx = sdd->rx_dma.ch;
 
-	return 0;
+	sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter,
+			   sdd->cntrlr_info->dma_tx, dev, "tx");
+	if (!sdd->tx_dma.ch) {
+		dev_err(dev, "Failed to get TX DMA channel\n");
+		dma_release_channel(sdd->rx_dma.ch);
+		return -EBUSY;
+	}
+	spi->dma_tx = sdd->tx_dma.ch;
 
-out_rx:
-	dma_release_channel(sdd->rx_dma.ch);
-out:
-	return ret;
+	return 0;
 }
 
 static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi)