[PATCH net v2 0/4] fix queue lock up and reduce timeouts

[Justin Chen <justin.chen@broadcom.com>]

We have been seeing reports of logs like this.
# [   39.713199] bcmgenet 1001300000.ethernet eth0: NETDEV WATCHDOG: CPU: 0: transmit queue 2 timed out 7991 ms
[   41.761198] bcmgenet 1001300000.ethernet eth0: NETDEV WATCHDOG: CPU: 0: transmit queue 2 timed out 10039 ms
[   43.745198] bcmgenet 1001300000.ethernet eth0: NETDEV WATCHDOG: CPU: 0: transmit queue 2 timed out 12023 ms
[   45.729198] bcmgenet 1001300000.ethernet eth0: NETDEV WATCHDOG: CPU: 0: transmit queue 2 timed out 14007 ms

We have two issues. The persistent queue timeouts and the eventual lock up of the entire transmit.

This is due to two issues.
- We have a small queue that is prone to timeouts. We optimize this by relaxing the tx queue stop conditions.
- We have a racing and leaking timeout handler that is also fixed.

v2
- These patches stayed the same.
  net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
  net: bcmgenet: fix leaking free_bds
- New patches that fix a few other slightly related issues.
  net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
  net: bcmgenet: relax the xmit ring full case

Justin Chen (4):
  net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
  net: bcmgenet: fix leaking free_bds
  net: bcmgenet: fix racing timeout handler
  net: bcmgenet: relax the xmit ring full case

 .../net/ethernet/broadcom/genet/bcmgenet.c    | 39 ++++++++-----------
 1 file changed, 17 insertions(+), 22 deletions(-)

-- 
2.34.1