[Intel-wired-lan] [PATCH 2/2] fm10k: reschedule service event if we stall the PF<->SM mailbox

[Singh, Krishneil K]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Jacob Keller
> Sent: Wednesday, March 8, 2017 3:56 PM
> To: Intel Wired LAN <intel-wired-lan at lists.osuosl.org>
> Subject: [Intel-wired-lan] [PATCH 2/2] fm10k: reschedule service event if we
> stall the PF<->SM mailbox
> 
> When we are handling PF<->VF mailbox messages, it is possible that the
> VF will send us so many messages that the PF<->SM FIFO will fill up. In
> this case, we stop the loop and wait until the service event is
> rescheduled.
> 
> Normally this should happen due to an interrupt. But it is possible that
> we don't get another interrupt for a while and it isn't until the
> service timer actually reschedules us. Instead, simply reschedule
> immediately which will cause the service event to be run again as soon
> as we exit.
> 
> This ensures that we promptly handle all of the PF<->VF messages with
> minimal delay, while still giving time for the SM mailbox to drain.
> 
> Signed-off-by: Jacob Keller <jacob.e.keller at intel.com>
> ---

Tested-by: Krishneil Singh  <krishneil.k.singh at intel.com>