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authorAlexander Duyck <alexander.h.duyck@intel.com>2012-08-08 05:23:22 +0000
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2012-09-20 02:30:32 -0700
commitae1c07a6b7ced6c0c94c99e3b53f4e7856fa8bff (patch)
tree95f4b95077c450fccede70fb20d2c922369d433a
parentr8169: use unlimited DMA burst for TX (diff)
downloadlinux-dev-ae1c07a6b7ced6c0c94c99e3b53f4e7856fa8bff.tar.xz
linux-dev-ae1c07a6b7ced6c0c94c99e3b53f4e7856fa8bff.zip
igb: Remove artificial restriction on RQDPC stat reading
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 <alexander.h.duyck@intel.com> Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
-rw-r--r--drivers/net/ethernet/intel/igb/igb_main.c8
1 files 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 19d7666dfccb..246646b61a1a 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4681,11 +4681,13 @@ 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);