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| author | Tushar Dave <tushar.n.dave@intel.com> | 2012-07-31 02:02:43 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-08-19 18:15:32 +0100 |
| commit | d12284de6c7785808ed76ca3d55d243e5c9e81a6 (patch) | |
| tree | 452a34fd677d10f0cac18202e1d598ff8918c473 | |
| parent | 074007af94479db591df670f9bf96a942ad47eda (diff) | |
| download | lwn-d12284de6c7785808ed76ca3d55d243e5c9e81a6.tar.gz lwn-d12284de6c7785808ed76ca3d55d243e5c9e81a6.zip | |
e1000e: NIC goes up and immediately goes down
commit b7ec70be01a87f2c85df3ae11046e74f9b67e323 upstream.
Found that commit d478eb44 was a bad commit.
If the link partner is transmitting codeword (even if NULL codeword),
then the RXCW.C bit will be set so check for RXCW.CW is unnecessary.
Ref: RH BZ 840642
Reported-by: Fabio Futigami <ffutigam@redhat.com>
Signed-off-by: Tushar Dave <tushar.n.dave@intel.com>
CC: Marcelo Ricardo Leitner <mleitner@redhat.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/82571.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/82571.c b/drivers/net/ethernet/intel/e1000e/82571.c index 3072d35cc4b3..4f4d52a4a98c 100644 --- a/drivers/net/ethernet/intel/e1000e/82571.c +++ b/drivers/net/ethernet/intel/e1000e/82571.c @@ -1600,10 +1600,8 @@ static s32 e1000_check_for_serdes_link_82571(struct e1000_hw *hw) * auto-negotiation in the TXCW register and disable * forced link in the Device Control register in an * attempt to auto-negotiate with our link partner. - * If the partner code word is null, stop forcing - * and restart auto negotiation. */ - if ((rxcw & E1000_RXCW_C) || !(rxcw & E1000_RXCW_CW)) { + if (rxcw & E1000_RXCW_C) { /* Enable autoneg, and unforce link up */ ew32(TXCW, mac->txcw); ew32(CTRL, (ctrl & ~E1000_CTRL_SLU)); |