net: systemport: fix DMA allocation/freeing sizes

We should not be allocating a single byte of DMA coherent memory, but
instead a full-sized struct dma_desc (8 bytes).

Fixes: 80105befdb4b ("net: systemport: add Broadcom SYSTEMPORT Ethernet MAC driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 3a6778a667f4558f52f1327f413e088882490f7d..c81bf74685c0763480d227c074336d25951d7755 100644 (file)
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -1110,7 +1110,8 @@ static int bcm_sysport_init_tx_ring(struct bcm_sysport_priv *priv,
        /* We just need one DMA descriptor which is DMA-able, since writing to
         * the port will allocate a new descriptor in its internal linked-list
         */
-       p = dma_zalloc_coherent(kdev, 1, &ring->desc_dma, GFP_KERNEL);
+       p = dma_zalloc_coherent(kdev, sizeof(struct dma_desc), &ring->desc_dma,
+                               GFP_KERNEL);
        if (!p) {
                netif_err(priv, hw, priv->netdev, "DMA alloc failed\n");
                return -ENOMEM;
@@ -1183,7 +1184,8 @@ static void bcm_sysport_fini_tx_ring(struct bcm_sysport_priv *priv,
        ring->cbs = NULL;
 
        if (ring->desc_dma) {
-               dma_free_coherent(kdev, 1, ring->desc_cpu, ring->desc_dma);
+               dma_free_coherent(kdev, sizeof(struct dma_desc),
+                                 ring->desc_cpu, ring->desc_dma);
                ring->desc_dma = 0;
        }
        ring->size = 0;