net-forcedeth: fix possible stats inaccuracies on 32b hosts

The software stats are updated from BH, this change ensures that 32b
UP hosts use appropriate protection.

Tested:
  - HW/SW stats consistent with pktgen (in particular tx=rx)
  - HW/SW stats consistent when tx/rx offloads disabled
  - no problem with+without lockdep (SMP 16-way)

Signed-off-by: David Decotigny <david.decotigny@google.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
index 0d8d5c0..4990534 100644 (file)
--- a/drivers/net/ethernet/nvidia/forcedeth.c
+++ b/drivers/net/ethernet/nvidia/forcedeth.c
@@ -1756,19 +1756,19 @@ nv_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *storage)
 
        /* software stats */
        do {
-               syncp_start = u64_stats_fetch_begin(&np->swstats_rx_syncp);
+               syncp_start = u64_stats_fetch_begin_bh(&np->swstats_rx_syncp);
                storage->rx_packets       = np->stat_rx_packets;
                storage->rx_bytes         = np->stat_rx_bytes;
                storage->rx_dropped       = np->stat_rx_dropped;
                storage->rx_missed_errors = np->stat_rx_missed_errors;
-       } while (u64_stats_fetch_retry(&np->swstats_rx_syncp, syncp_start));
+       } while (u64_stats_fetch_retry_bh(&np->swstats_rx_syncp, syncp_start));
 
        do {
-               syncp_start = u64_stats_fetch_begin(&np->swstats_tx_syncp);
+               syncp_start = u64_stats_fetch_begin_bh(&np->swstats_tx_syncp);
                storage->tx_packets = np->stat_tx_packets;
                storage->tx_bytes   = np->stat_tx_bytes;
                storage->tx_dropped = np->stat_tx_dropped;
-       } while (u64_stats_fetch_retry(&np->swstats_tx_syncp, syncp_start));
+       } while (u64_stats_fetch_retry_bh(&np->swstats_tx_syncp, syncp_start));
 
        /* If the nic supports hw counters then retrieve latest values */
        if (np->driver_data & DEV_HAS_STATISTICS_V123) {