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niu: Fix to check for dma mapping errors. 

Fix Neptune ethernet driver to check dma mapping error after map_page()
interface returns.

Signed-off-by: Shuah Khan <shuah.khan@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shuah Khan 2012-07-20 11:50:35 +00:00 committed by David S. Miller
parent 818810472b
commit ec2deec1f3
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/sun/niu.c
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@ -3335,6 +3335,10 @@ static int niu_rbr_add_page(struct niu *np, struct rx_ring_info *rp,
addr = np->ops->map_page(np->device, page, 0,
PAGE_SIZE, DMA_FROM_DEVICE);
if (!addr) {
__free_page(page);
return -ENOMEM;
}
niu_hash_page(rp, page, addr);
if (rp->rbr_blocks_per_page > 1)