From: huangdaode <huangda...@hisilicon.com>
Date: Fri, 25 Sep 2015 16:29:50 +0800
> @@ -191,9 +191,12 @@ static void hns_rcb_ring_init(struct ring_pair_cb
> *ring_pair, int ring_type)
> if (ring_type == RX_RING) {
> dsaf_write_dev(q, RCB_RING_RX_RING_BASEADDR_L_REG,
> (u32)dma);
> +#ifdef CONFIG_64BIT
> dsaf_write_dev(q, RCB_RING_RX_RING_BASEADDR_H_REG,
> (u32)(dma >> 32));
> -
> +#else
> + dsaf_write_dev(q, RCB_RING_RX_RING_BASEADDR_H_REG, 0);
> +#endif
> dsaf_write_dev(q, RCB_RING_RX_RING_BD_LEN_REG,
> bd_size_type);
> dsaf_write_dev(q, RCB_RING_RX_RING_BD_NUM_REG,
CONFIG_64BIT doesn't tell you if _DMA_ addresses are 64-bit or not.
Furthermore there is a portable way to shift a 32-bit value down
32-bits whilst avoiding warnings.
(x >> 31) >> 1
So you should definitely use that instead of the CONFIG_64BIT test.
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