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[dpdk-dev,12/26] ixgbe/base: disable FEC(Forward Error Correction) to save power

Message ID 1433481718-24253-13-git-send-email-wenzhuo.lu@intel.com (mailing list archive)
State Accepted, archived
Headers show

Commit Message

Wenzhuo Lu June 5, 2015, 5:21 a.m. UTC
The FEC feature can improve BER(Bit Error Rate) but uses more power
to do so. It also cannot be used with EEE(Energy Efficient Ethernet).
EEE is an important feature, and we have no known BER issues, so FEC
is not needed.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/ixgbe/base/ixgbe_x550.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/net/ixgbe/base/ixgbe_x550.c b/drivers/net/ixgbe/base/ixgbe_x550.c
index 319aa0d..e6d0a9f 100644
--- a/drivers/net/ixgbe/base/ixgbe_x550.c
+++ b/drivers/net/ixgbe/base/ixgbe_x550.c
@@ -1383,8 +1383,8 @@  s32 ixgbe_setup_kr_x550em(struct ixgbe_hw *hw)
 		return status;
 
 	reg_val |= IXGBE_KRM_LINK_CTRL_1_TETH_AN_ENABLE;
-	reg_val |= IXGBE_KRM_LINK_CTRL_1_TETH_AN_FEC_REQ;
-	reg_val |= IXGBE_KRM_LINK_CTRL_1_TETH_AN_CAP_FEC;
+	reg_val &= ~(IXGBE_KRM_LINK_CTRL_1_TETH_AN_FEC_REQ |
+		     IXGBE_KRM_LINK_CTRL_1_TETH_AN_CAP_FEC);
 	reg_val &= ~(IXGBE_KRM_LINK_CTRL_1_TETH_AN_CAP_KR |
 		     IXGBE_KRM_LINK_CTRL_1_TETH_AN_CAP_KX);