net: bcmgenet: start/stop sequence refinement

This commit set is the result of an investigation into an issue that occurred when bringing the interface up and down repeatedly with an external 100BASE-T PHY. In some cases the MAC would experience mass receive packet duplication that could in rare cases lead to a stall from overflow. The fix for this is contained in the third commit.

The first 3 commits represent bug fixes that should be applied to the net repository and are candidates for backporting to stable releases. The remaining commits are enhancements which is why the set is being submitted to net-next but they are implemented on top of the fixes.

The first fix is provided as justification for why the set isn't split between a net submission and a net-next submission.

Doug Berger (9):
net: bcmgenet: correct bad merge
net: bcmgenet: prevent duplicate calls of bcmgenet_dma_teardown
net: bcmgenet: enable loopback during UniMAC sw_reset
net: bcmgenet: move NAPI initialization to ring initialization
net: bcmgenet: cleanup ring interrupt masking and unmasking
net: bcmgenet: rework bcmgenet_netif_start and bcmgenet_netif_stop
net: bcmgenet: relax lock constraints to reduce IRQ latency Revert "net: bcmgenet: Software reset EPHY after power on"
net: bcmgenet: use dev->phydev instead of priv->phydev

 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 269 +++++++------------------
 drivers/net/ethernet/broadcom/genet/bcmgenet.h |   2 -
 drivers/net/ethernet/broadcom/genet/bcmmii.c   |  33 +--
 3 files changed, 83 insertions(+), 221 deletions(-)

2.14.1