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authorShannon Nelson <shannon.nelson@oracle.com>2017-03-14 10:24:43 -0700
committerDavid S. Miller <davem@davemloft.net>2017-03-16 20:29:55 -0700
commit9c5a3a1f9388100d4b03e85faf0cce8264985302 (patch)
tree519eb35a0f289417cc4d58d92b14eb57762f2c44 /Kbuild
parentb12a96f5cd04583f45a1b6554b8f3786b26db913 (diff)
downloadlinux-9c5a3a1f9388100d4b03e85faf0cce8264985302.tar.bz2
sunvnet: xoff not needed when removing port link
The sunvnet netdev is connected to the controlling ldom's vswitch for network bridging. However, for higher performance between ldoms, there also is a channel between each client ldom. These connections are represented in the sunvnet driver by a queue for each ldom. The driver uses select_queue to tell the stack which queue to use by tracking the mac addresses on the other end of each port. When a connected ldom shuts down, the driver receives an LDC_EVENT_RESET and the port is removed from the driver, thus a queue with no ldom on the other end will never be selected for Tx. The driver was trying to reinforce the "don't use this queue" notion with netif_tx_stop_queue() and netif_tx_wake_queue(), which really should only be used to signal a Tx queue is full (aka XOFF). This misuse of queue state resulted in NETDEV WATCHDOG messages and lots of unnecessary calls into the driver's tx_timeout handler. Simply removing these takes care of the problem. Orabug: 25190537 Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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