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    Subject[PATCH RFT RESEND] net: Fix Neptune ethernet driver to check dma mapping error
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    Date
    Fix Neptune ethernet driver to check dma mapping error after map_page()
    interface returns.

    Signed-off-by: Shuah Khan <shuah.khan@hp.com>
    ---
    drivers/net/ethernet/sun/niu.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
    index 8c726b7..60d5c03 100644
    --- a/drivers/net/ethernet/sun/niu.c
    +++ b/drivers/net/ethernet/sun/niu.c
    @@ -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)
    --
    1.7.9.5




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