diff options
| author | Vladimir Oltean | 2021-03-10 14:03:47 +0200 |
|---|---|---|
| committer | David S. Miller | 2021-03-10 13:14:15 -0800 |
| commit | c027aa9201eb9af8067282d4b8a7ce7523cd3c8d (patch) | |
| tree | de60753594b13c22bea0b9c74ace90c544b206ad /drivers | |
| parent | 4b47c0b81ffd9b395b5afc3ef41c69cceb6a8576 (diff) | |
net: enetc: simplify callers of enetc_rxbd_next
When we iterate through the BDs in the RX ring, the software producer
index (which is already passed by value to enetc_rxbd_next) lags behind,
and we end up with this funny looking "++i == rx_ring->bd_count" check
so that we drag it after us.
Let's pass the software producer index "i" by reference, so that
enetc_rxbd_next can increment it by itself (mod rx_ring->bd_count),
especially since enetc_rxbd_next has to increment the index anyway.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/freescale/enetc/enetc.c | 21 | ||||
| -rw-r--r-- | drivers/net/ethernet/freescale/enetc/enetc.h | 23 |
2 files changed, 20 insertions, 24 deletions
diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c index 53c8a698c72c..7bf56dd8b580 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.c +++ b/drivers/net/ethernet/freescale/enetc/enetc.c @@ -479,13 +479,8 @@ static int enetc_refill_rx_ring(struct enetc_bdr *rx_ring, const int buff_cnt) /* clear 'R" as well */ rxbd->r.lstatus = 0; - rxbd = enetc_rxbd_next(rx_ring, rxbd, i); - rx_swbd++; - i++; - if (unlikely(i == rx_ring->bd_count)) { - i = 0; - rx_swbd = rx_ring->rx_swbd; - } + enetc_rxbd_next(rx_ring, &rxbd, &i); + rx_swbd = &rx_ring->rx_swbd[i]; } if (likely(j)) { @@ -700,9 +695,7 @@ static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring, cleaned_cnt++; - rxbd = enetc_rxbd_next(rx_ring, rxbd, i); - if (unlikely(++i == rx_ring->bd_count)) - i = 0; + enetc_rxbd_next(rx_ring, &rxbd, &i); if (unlikely(bd_status & ENETC_RXBD_LSTATUS(ENETC_RXBD_ERR_MASK))) { @@ -711,9 +704,7 @@ static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring, dma_rmb(); bd_status = le32_to_cpu(rxbd->r.lstatus); - rxbd = enetc_rxbd_next(rx_ring, rxbd, i); - if (unlikely(++i == rx_ring->bd_count)) - i = 0; + enetc_rxbd_next(rx_ring, &rxbd, &i); } rx_ring->ndev->stats.rx_dropped++; @@ -736,9 +727,7 @@ static int enetc_clean_rx_ring(struct enetc_bdr *rx_ring, cleaned_cnt++; - rxbd = enetc_rxbd_next(rx_ring, rxbd, i); - if (unlikely(++i == rx_ring->bd_count)) - i = 0; + enetc_rxbd_next(rx_ring, &rxbd, &i); } rx_byte_cnt += skb->len; diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h index af8b8be114bd..30b9ad550d7b 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.h +++ b/drivers/net/ethernet/freescale/enetc/enetc.h @@ -121,19 +121,26 @@ static inline union enetc_rx_bd *enetc_rxbd(struct enetc_bdr *rx_ring, int i) return &(((union enetc_rx_bd *)rx_ring->bd_base)[hw_idx]); } -static inline union enetc_rx_bd *enetc_rxbd_next(struct enetc_bdr *rx_ring, - union enetc_rx_bd *rxbd, - int i) +static inline void enetc_rxbd_next(struct enetc_bdr *rx_ring, + union enetc_rx_bd **old_rxbd, int *old_index) { - rxbd++; + union enetc_rx_bd *new_rxbd = *old_rxbd; + int new_index = *old_index; + + new_rxbd++; + #ifdef CONFIG_FSL_ENETC_PTP_CLOCK if (rx_ring->ext_en) - rxbd++; + new_rxbd++; #endif - if (unlikely(++i == rx_ring->bd_count)) - rxbd = rx_ring->bd_base; - return rxbd; + if (unlikely(++new_index == rx_ring->bd_count)) { + new_rxbd = rx_ring->bd_base; + new_index = 0; + } + + *old_rxbd = new_rxbd; + *old_index = new_index; } static inline union enetc_rx_bd *enetc_rxbd_ext(union enetc_rx_bd *rxbd) |