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forcedeth: remove unneeded stats updates
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Function ndo_get_stats() updates most of the stats from hardware
registers, making the manual updates un-needed. This change removes
these manual updates. Main exception is rx_missed_errors which needs
manual update.

Another exception is rx_packets, still updated manually in this commit
to make sure this patch doesn't change behavior of driver. This will
be addressed by a future patch.

Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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david decotigny authored and David S. Miller committed Nov 7, 2011
1 parent 2a4e7a0 commit 4687f3f
Showing 1 changed file with 1 addition and 34 deletions.
35 changes: 1 addition & 34 deletions drivers/net/ethernet/nvidia/forcedeth.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2374,16 +2374,8 @@ static int nv_tx_done(struct net_device *dev, int limit)
if (np->desc_ver == DESC_VER_1) {
if (flags & NV_TX_LASTPACKET) {
if (flags & NV_TX_ERROR) {
if (flags & NV_TX_UNDERFLOW)
dev->stats.tx_fifo_errors++;
if (flags & NV_TX_CARRIERLOST)
dev->stats.tx_carrier_errors++;
if ((flags & NV_TX_RETRYERROR) && !(flags & NV_TX_RETRYCOUNT_MASK))
nv_legacybackoff_reseed(dev);
dev->stats.tx_errors++;
} else {
dev->stats.tx_packets++;
dev->stats.tx_bytes += np->get_tx_ctx->skb->len;
}
dev_kfree_skb_any(np->get_tx_ctx->skb);
np->get_tx_ctx->skb = NULL;
Expand All @@ -2392,16 +2384,8 @@ static int nv_tx_done(struct net_device *dev, int limit)
} else {
if (flags & NV_TX2_LASTPACKET) {
if (flags & NV_TX2_ERROR) {
if (flags & NV_TX2_UNDERFLOW)
dev->stats.tx_fifo_errors++;
if (flags & NV_TX2_CARRIERLOST)
dev->stats.tx_carrier_errors++;
if ((flags & NV_TX2_RETRYERROR) && !(flags & NV_TX2_RETRYCOUNT_MASK))
nv_legacybackoff_reseed(dev);
dev->stats.tx_errors++;
} else {
dev->stats.tx_packets++;
dev->stats.tx_bytes += np->get_tx_ctx->skb->len;
}
dev_kfree_skb_any(np->get_tx_ctx->skb);
np->get_tx_ctx->skb = NULL;
Expand Down Expand Up @@ -2434,9 +2418,7 @@ static int nv_tx_done_optimized(struct net_device *dev, int limit)
nv_unmap_txskb(np, np->get_tx_ctx);

if (flags & NV_TX2_LASTPACKET) {
if (!(flags & NV_TX2_ERROR))
dev->stats.tx_packets++;
else {
if (flags & NV_TX2_ERROR) {
if ((flags & NV_TX2_RETRYERROR) && !(flags & NV_TX2_RETRYCOUNT_MASK)) {
if (np->driver_data & DEV_HAS_GEAR_MODE)
nv_gear_backoff_reseed(dev);
Expand Down Expand Up @@ -2636,7 +2618,6 @@ static int nv_rx_process(struct net_device *dev, int limit)
if ((flags & NV_RX_ERROR_MASK) == NV_RX_ERROR4) {
len = nv_getlen(dev, skb->data, len);
if (len < 0) {
dev->stats.rx_errors++;
dev_kfree_skb(skb);
goto next_pkt;
}
Expand All @@ -2650,11 +2631,6 @@ static int nv_rx_process(struct net_device *dev, int limit)
else {
if (flags & NV_RX_MISSEDFRAME)
dev->stats.rx_missed_errors++;
if (flags & NV_RX_CRCERR)
dev->stats.rx_crc_errors++;
if (flags & NV_RX_OVERFLOW)
dev->stats.rx_over_errors++;
dev->stats.rx_errors++;
dev_kfree_skb(skb);
goto next_pkt;
}
Expand All @@ -2670,7 +2646,6 @@ static int nv_rx_process(struct net_device *dev, int limit)
if ((flags & NV_RX2_ERROR_MASK) == NV_RX2_ERROR4) {
len = nv_getlen(dev, skb->data, len);
if (len < 0) {
dev->stats.rx_errors++;
dev_kfree_skb(skb);
goto next_pkt;
}
Expand All @@ -2682,11 +2657,6 @@ static int nv_rx_process(struct net_device *dev, int limit)
}
/* the rest are hard errors */
else {
if (flags & NV_RX2_CRCERR)
dev->stats.rx_crc_errors++;
if (flags & NV_RX2_OVERFLOW)
dev->stats.rx_over_errors++;
dev->stats.rx_errors++;
dev_kfree_skb(skb);
goto next_pkt;
}
Expand All @@ -2704,7 +2674,6 @@ static int nv_rx_process(struct net_device *dev, int limit)
skb->protocol = eth_type_trans(skb, dev);
napi_gro_receive(&np->napi, skb);
dev->stats.rx_packets++;
dev->stats.rx_bytes += len;
next_pkt:
if (unlikely(np->get_rx.orig++ == np->last_rx.orig))
np->get_rx.orig = np->first_rx.orig;
Expand Down Expand Up @@ -2787,9 +2756,7 @@ static int nv_rx_process_optimized(struct net_device *dev, int limit)
__vlan_hwaccel_put_tag(skb, vid);
}
napi_gro_receive(&np->napi, skb);

dev->stats.rx_packets++;
dev->stats.rx_bytes += len;
} else {
dev_kfree_skb(skb);
}
Expand Down

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