[PATCH net-next 0/8] ibmvnic: Failover hardening

[Thomas Falcon <tlfalcon@linux.vnet.ibm.com>]

Introduce additional transport event hardening to handle
events during device reset. In the driver's current state,
if a transport event is received during device reset, it can
cause the device to become unresponsive as invalid operations
are processed as the backing device context changes. After
a transport event, the device expects a request to begin the
initialization process. If the driver is still processing
a previously queued device reset in this state, it is likely
to fail as firmware will reject any commands other than the
one to initialize the client driver's Command-Response Queue.

Instead of failing and becoming dormant, the driver will make
one more attempt to recover and continue operation. This is
achieved by setting a state flag, which if true will direct
the driver to clean up all allocated resources and perform
a hard reset in an attempt to bring the driver back to an
operational state.

Thomas Falcon (8):
  ibmvnic: Mark NAPI flag as disabled when released
  ibmvnic: Introduce active CRQ state
  ibmvnic: Check CRQ command return codes
  ibmvnic: Return error code if init interrupted by transport event
  ibmvnic: Handle error case when setting link state
  ibmvnic: Create separate initialization routine for resets
  ibmvnic: Set resetting state at earliest possible point
  ibmvnic: Introduce hard reset recovery

 drivers/net/ethernet/ibm/ibmvnic.c | 223 +++++++++++++++++++++++++++++++++----
 drivers/net/ethernet/ibm/ibmvnic.h |   2 +
 2 files changed, 202 insertions(+), 23 deletions(-)

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2.7.5