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drivers: net: xgene: fix: Add dma_unmap_single 

In addition to xgene_enet_delete_bufpool() freeing skbs, their associated
dma memory should also be unmapped.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Iyappan Subramanian 2016-08-12 22:05:38 -07:00 committed by David S. Miller
parent ee0f95440d
commit 6e434627bc
1 changed files with 12 additions and 2 deletions
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14
drivers/net/ethernet/apm/xgene/xgene_enet_main.c
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@ -72,7 +72,6 @@ static int xgene_enet_refill_bufpool(struct xgene_enet_desc_ring *buf_pool,
skb = netdev_alloc_skb_ip_align(ndev, len);
if (unlikely(!skb))
return -ENOMEM;
buf_pool->rx_skb[tail] = skb;
dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE);
if (dma_mapping_error(dev, dma_addr)) {
@ -81,6 +80,8 @@ static int xgene_enet_refill_bufpool(struct xgene_enet_desc_ring *buf_pool,
return -EINVAL;
}
buf_pool->rx_skb[tail] = skb;
raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) |
SET_VAL(BUFDATALEN, bufdatalen) |
SET_BIT(COHERENT));
@ -102,12 +103,21 @@ static u8 xgene_enet_hdr_len(const void *data)
static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool)
{
struct device *dev = ndev_to_dev(buf_pool->ndev);
struct xgene_enet_raw_desc16 *raw_desc;
dma_addr_t dma_addr;
int i;
/* Free up the buffers held by hardware */
for (i = 0; i < buf_pool->slots; i++) {
if (buf_pool->rx_skb[i])
if (buf_pool->rx_skb[i]) {
dev_kfree_skb_any(buf_pool->rx_skb[i]);
raw_desc = &buf_pool->raw_desc16[i];
dma_addr = GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1));
dma_unmap_single(dev, dma_addr, XGENE_ENET_MAX_MTU,
DMA_FROM_DEVICE);
}
}
}