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 <peter.p.waskiewicz.jr@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1783,6 +1783,20 @@ s32 ixgbe_fc_autoneg(struct ixgbe_hw *hw)
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}
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}
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/*
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* Bail out on
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* - copper or CX4 adapters
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* - fiber adapters running at 10gig
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*/
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if ((hw->phy.media_type == ixgbe_media_type_copper) ||
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(hw->phy.media_type == ixgbe_media_type_cx4) ||
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((hw->phy.media_type == ixgbe_media_type_fiber) &&
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(speed == IXGBE_LINK_SPEED_10GB_FULL))) {
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hw->fc.fc_was_autonegged = false;
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hw->fc.current_mode = hw->fc.requested_mode;
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goto out;
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}
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/*
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* Read the AN advertisement and LP ability registers and resolve
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* local flow control settings accordingly
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