From: Manfred Rudigier manfred.rudigier@omicronenergy.com
[ Upstream commit 8d5cfd7f76a2414e23c74bb8858af7540365d985 ]
At least on the i350 there is an annoying behavior that is maybe also present on 82580 devices, but was probably not noticed yet as MAS is not widely used.
If no cable is connected on both fiber/copper ports the media auto sense code will constantly swap between them as part of the watchdog task and produce many unnecessary kernel log messages.
The swap code responsible for this behavior (switching to fiber) should not be executed if the current media type is copper and there is no signal detected on the fiber port. In this case we can safely wait until the AUTOSENSE_EN bit is cleared.
Signed-off-by: Manfred Rudigier manfred.rudigier@omicronenergy.com Tested-by: Aaron Brown aaron.f.brown@intel.com Signed-off-by: Jeff Kirsher jeffrey.t.kirsher@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/igb/igb_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index ab76a5f77cd0e..36db874f3c928 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -2064,7 +2064,8 @@ static void igb_check_swap_media(struct igb_adapter *adapter) if ((hw->phy.media_type == e1000_media_type_copper) && (!(connsw & E1000_CONNSW_AUTOSENSE_EN))) { swap_now = true; - } else if (!(connsw & E1000_CONNSW_SERDESD)) { + } else if ((hw->phy.media_type != e1000_media_type_copper) && + !(connsw & E1000_CONNSW_SERDESD)) { /* copper signal takes time to appear */ if (adapter->copper_tries < 4) { adapter->copper_tries++;