From: Matt Turner <matt.turner@intel.com>
Date: Tue, 14 Nov 2017 15:51:33 -0800
Subject: e1000e: Alert the user that C-states will be disabled by enabling
jumbo frames
Patch-mainline: v4.16-rc1
Git-commit: 8299b006d743084c6f47210e5a6670f263b057df
References: bsc#1056664 FATE#322185
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>
Acked-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Benjamin Poirier <bpoirier@suse.com>
---
drivers/net/ethernet/intel/e1000e/netdev.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -3306,6 +3306,8 @@ static void e1000_configure_rx(struct e1
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,