From 248924caf7d1e452e3cad8433ae7b4942654ea8b Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Wed, 8 Aug 2012 05:23:22 +0000 Subject: igb: Remove artificial restriction on RQDPC stat reading commit ae1c07a6b7ced6c0c94c99e3b53f4e7856fa8bff upstream. For some reason the reading of the RQDPC register was being artificially limited to 4K. Instead of limiting the value we should read the value and add the full amount. Otherwise this can lead to a misleading number of dropped packets when the actual value is in fact much higher. Signed-off-by: Alexander Duyck Tested-by: Jeff Pieper Signed-off-by: Jeff Kirsher Cc: Vinson Lee Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/intel/igb/igb_main.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 6b4f0148ee6c..1fb180dbc7b1 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -4649,11 +4649,13 @@ void igb_update_stats(struct igb_adapter *adapter, bytes = 0; packets = 0; for (i = 0; i < adapter->num_rx_queues; i++) { - u32 rqdpc_tmp = rd32(E1000_RQDPC(i)) & 0x0FFF; + u32 rqdpc = rd32(E1000_RQDPC(i)); struct igb_ring *ring = adapter->rx_ring[i]; - ring->rx_stats.drops += rqdpc_tmp; - net_stats->rx_fifo_errors += rqdpc_tmp; + if (rqdpc) { + ring->rx_stats.drops += rqdpc; + net_stats->rx_fifo_errors += rqdpc; + } do { start = u64_stats_fetch_begin_bh(&ring->rx_syncp); -- cgit v1.2.3