[PATCH 12/26] ixgbe/base: disable FEC(Forward Error Correction) to save power
From: Wenzhuo Lu <hidden>
Date: 2015-06-05 05:22:33
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> --- drivers/net/ixgbe/base/ixgbe_x550.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
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);
--
1.9.3