From 9bbe3a570b4984ff2e90014074ba3a06a05384a0 Mon Sep 17 00:00:00 2001 From: PJ Waskiewicz Date: Tue, 24 Nov 2009 18:51:28 +0000 Subject: [PATCH] ixgbe: Disable Flow Control for certain devices Flow Control autoneg should be disabled for certain adapters that don't support autonegotiation of Flow Control at 10 gigabit. These interfaces are the 10GBASE-T devices, CX4, and SFP+, all running at 10 gigabit only. 1 gigabit is fine. Signed-off-by: Peter P Waskiewicz Jr Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/ixgbe/ixgbe_common.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c index 40ff120a9ad..f42a954ef66 100644 --- a/drivers/net/ixgbe/ixgbe_common.c +++ b/drivers/net/ixgbe/ixgbe_common.c @@ -1783,6 +1783,20 @@ s32 ixgbe_fc_autoneg(struct ixgbe_hw *hw) } } + /* + * Bail out on + * - copper or CX4 adapters + * - fiber adapters running at 10gig + */ + if ((hw->phy.media_type == ixgbe_media_type_copper) || + (hw->phy.media_type == ixgbe_media_type_cx4) || + ((hw->phy.media_type == ixgbe_media_type_fiber) && + (speed == IXGBE_LINK_SPEED_10GB_FULL))) { + hw->fc.fc_was_autonegged = false; + hw->fc.current_mode = hw->fc.requested_mode; + goto out; + } + /* * Read the AN advertisement and LP ability registers and resolve * local flow control settings accordingly -- 2.39.5