ixgbe: Defer flow control programming while admission is closedHEADmain

Cache a validated flow control setting without touching hardware when
iflib has closed admission.  The queues may still be live pending a
watchdog stop, or the device may already be stopped or suspended.  RX
initialization and link setup replay the cached flow control policy.

For live updates, decide once under the context lock whether to touch
hardware, then mask MDD around SRRCTL writes regardless of a concurrent
watchdog closing admission.  The context lock excludes actual stop and
reinitialization while these writes are in progress.

MFC after:	2 weeks
Sponsored by:	BBOX.io

0 files changed, 0 insertions, 0 deletions