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Commit e9d7af78 authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
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net: systemport: Simplify circular pointer arithmetic 



Similar to c298ede2 ("net: bcmgenet: simplify circular pointer
arithmetic") we don't need to complex arthimetic since we always have a
ring size that is a power of 2.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6baa785a

drivers/net/ethernet/broadcom/bcmsysport.c

+1 −5
Original line number Diff line number Diff line
@@ -682,11 +682,7 @@ static unsigned int bcm_sysport_desc_rx(struct bcm_sysport_priv *priv, 
		p_index = rdma_readl(priv, RDMA_CONS_INDEX);

	p_index &= RDMA_PROD_INDEX_MASK;



	if (p_index < priv->rx_c_index)

		to_process = (RDMA_CONS_INDEX_MASK + 1) -

			priv->rx_c_index + p_index;

	else

		to_process = p_index - priv->rx_c_index;

	to_process = (p_index - priv->rx_c_index) & RDMA_CONS_INDEX_MASK;



	netif_dbg(priv, rx_status, ndev,

		  "p_index=%d rx_c_index=%d to_process=%d\n",