[Intel-wired-lan] [PATCH 2/3] e1000e: Alert the user that C-states will be disabled by enabling jumbo frames

[Matt Turner <mattst88@gmail.com>]

From: Matt Turner <matt.turner@intel.com>

I personally spent a long time trying to decypher why my CPU would not
reach deeper C-states. Let's just tell the next user what's going on.

Signed-off-by: Matt Turner <matt.turner@intel.com>
---
 drivers/net/ethernet/intel/e1000e/netdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 286d0277284e..4dcff481c4b4 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -3288,6 +3288,9 @@ static void e1000_configure_rx(struct e1000_adapter *adapter)
 			ew32(RXDCTL(0), rxdctl | 0x3 | BIT(8));
 		}
 
+		dev_info(&adapter->pdev->dev,
+			 "Some CPU C-states have been disabled in order to "
+			 "enable jumbo frames\n");
 		pm_qos_update_request(&adapter->pm_qos_req, lat);
 	} else {
 		pm_qos_update_request(&adapter->pm_qos_req,
-- 
2.13.6