net: sxgbe: Fix waring for double kfree()

This patch fixes double kfree() calls at init_rx_ring() because
it causes static checker warning.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Byungho An <bh74.an@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
index 6984944..b1a2718 100644 (file)
--- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
+++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
@@ -474,13 +474,19 @@ static int init_rx_ring(struct net_device *dev, u8 queue_no,
        /* allocate memory for RX skbuff array */
        rx_ring->rx_skbuff_dma = kmalloc_array(rx_rsize,
                                               sizeof(dma_addr_t), GFP_KERNEL);
-       if (rx_ring->rx_skbuff_dma == NULL)
-               goto dmamem_err;
+       if (!rx_ring->rx_skbuff_dma) {
+               dma_free_coherent(priv->device,
+                                 rx_rsize * sizeof(struct sxgbe_rx_norm_desc),
+                                 rx_ring->dma_rx, rx_ring->dma_rx_phy);
+               goto error;
+       }
 
        rx_ring->rx_skbuff = kmalloc_array(rx_rsize,
                                           sizeof(struct sk_buff *), GFP_KERNEL);
-       if (rx_ring->rx_skbuff == NULL)
-               goto rxbuff_err;
+       if (!rx_ring->rx_skbuff) {
+               kfree(rx_ring->rx_skbuff_dma);
+               goto error;
+       }
 
        /* initialise the buffers */
        for (desc_index = 0; desc_index < rx_rsize; desc_index++) {
@@ -502,13 +508,6 @@ static int init_rx_ring(struct net_device *dev, u8 queue_no,
 err_init_rx_buffers:
        while (--desc_index >= 0)
                free_rx_ring(priv->device, rx_ring, desc_index);
-       kfree(rx_ring->rx_skbuff);
-rxbuff_err:
-       kfree(rx_ring->rx_skbuff_dma);
-dmamem_err:
-       dma_free_coherent(priv->device,
-                         rx_rsize * sizeof(struct sxgbe_rx_norm_desc),
-                         rx_ring->dma_rx, rx_ring->dma_rx_phy);
 error:
        return -ENOMEM;
 }