[PATCH] net: altera: Handle dma_set_coherent_mask error codes

[Denis Kirjanov <kda@linux-powerpc.org>]

handle the error in the case that DMA mask is not supportyed

Fixes: bbd2190ce96d ("Altera TSE: Add main and header file for Altera Ethernet Driver")
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
---
 drivers/net/ethernet/altera/altera_tse_main.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c
index 8c5828582c21..7773d978321a 100644
--- a/drivers/net/ethernet/altera/altera_tse_main.c
+++ b/drivers/net/ethernet/altera/altera_tse_main.c
@@ -1439,10 +1439,14 @@ static int altera_tse_probe(struct platform_device *pdev)
 	}
 
 	if (!dma_set_mask(priv->device, DMA_BIT_MASK(priv->dmaops->dmamask))) {
-		dma_set_coherent_mask(priv->device,
+		ret = dma_set_coherent_mask(priv->device,
 				      DMA_BIT_MASK(priv->dmaops->dmamask));
+		if (ret)
+			goto err_free_netdev;
 	} else if (!dma_set_mask(priv->device, DMA_BIT_MASK(32))) {
-		dma_set_coherent_mask(priv->device, DMA_BIT_MASK(32));
+		ret = dma_set_coherent_mask(priv->device, DMA_BIT_MASK(32));
+		if (ret)
+			goto err_free_netdev;
 	} else {
 		ret = -EIO;
 		goto err_free_netdev;
-- 
2.16.4