[PATCH -next] spi: bcm2835: Fix error return code in bcm2835_dma_init()

[Wei Yongjun <weiyongjun1@xxxxxxxxxx>]

Fix to return negative error code -ENOMEM from the dma mapping error
handling case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
---
 drivers/spi/spi-bcm2835.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index 11c235879bb7..c4f4bd135279 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -940,6 +940,7 @@ static int bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
 	if (dma_mapping_error(ctlr->dma_tx->device->dev, bs->fill_tx_addr)) {
 		dev_err(dev, "cannot map zero page - not using DMA mode\n");
 		bs->fill_tx_addr = 0;
+		ret = -ENOMEM;
 		goto err_release;
 	}
 
@@ -949,6 +950,7 @@ static int bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
 						     DMA_MEM_TO_DEV, 0);
 	if (!bs->fill_tx_desc) {
 		dev_err(dev, "cannot prepare fill_tx_desc - not using DMA mode\n");
+		ret = -ENOMEM;
 		goto err_release;
 	}
 
@@ -979,6 +981,7 @@ static int bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
 	if (dma_mapping_error(ctlr->dma_rx->device->dev, bs->clear_rx_addr)) {
 		dev_err(dev, "cannot map clear_rx_cs - not using DMA mode\n");
 		bs->clear_rx_addr = 0;
+		ret = -ENOMEM;
 		goto err_release;
 	}
 
@@ -989,6 +992,7 @@ static int bcm2835_dma_init(struct spi_controller *ctlr, struct device *dev,
 					   DMA_MEM_TO_DEV, 0);
 		if (!bs->clear_rx_desc[i]) {
 			dev_err(dev, "cannot prepare clear_rx_desc - not using DMA mode\n");
+			ret = -ENOMEM;
 			goto err_release;
 		}