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net: systemport: fix DMA allocation/freeing sizes

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

Fixes: 80105befdb ("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>
This commit is contained in:
Florian Fainelli 2014-10-31 15:51:34 -07:00 committed by David S. Miller
parent 437374735c
commit 3e8fc38c21
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/broadcom/bcmsysport.c
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@ -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;