3.13.11.5 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Todd Fujinaka <todd.fujinaka@xxxxxxxxx>
commit e66c083aab32842f225bae2a2c30744bf96abaec upstream.
RQDPC on i210/i211 is R/W not ReadClear. Clear after reading.
Signed-off-by: Todd Fujinaka <todd.fujinaka@xxxxxxxxx>
Tested-by: Aaron Brown <aaron.f.brown@xxxxxxxxx>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
Cc: Tim Gardner <tim.gardner@xxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/igb/igb_main.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 025e5f4..0f42ce8 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4909,8 +4909,10 @@ void igb_update_stats(struct igb_adapter *adapter,
rcu_read_lock();
for (i = 0; i < adapter->num_rx_queues; i++) {
- u32 rqdpc = rd32(E1000_RQDPC(i));
struct igb_ring *ring = adapter->rx_ring[i];
+ u32 rqdpc = rd32(E1000_RQDPC(i));
+ if (hw->mac.type >= e1000_i210)
+ wr32(E1000_RQDPC(i), 0);
if (rqdpc) {
ring->rx_stats.drops += rqdpc;
--
1.9.1
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