[PATCH v2] net/ice: fix DCF state checking mechanism

[Zhang, Qi Z]

> -----Original Message-----
> From: Zhang, Peng1X <peng1x.zhang at intel.com>
> Sent: Wednesday, May 18, 2022 2:36 PM
> To: Zhang, Qi Z <qi.z.zhang at intel.com>; Yang, Qiming
> <qiming.yang at intel.com>; dev at dpdk.org
> Cc: stable at dpdk.org
> Subject: RE: [PATCH v2] net/ice: fix DCF state checking mechanism
> 
> Ok, because error phenomena happens during the period VF reset again and
> again following situation will possible happen as following steps describe:
> step 1. DCF state has been set to on after VF has reset.
> step 2. A VF reset happen, kernel send an event to DCF and set STATE to pause.
> step 3. Before DCF receive the event, it is possible a rule creation is ongoing,
> then in virtual channel queue, the rule request is in front of the "re-connect",
> then it will be rejected.
> step 4.But the DCF state is not set to pause, according to previous logic error
> code will be EINVAL, while not EAGAIN.
> 
> In conclusion, in upper situation error code which should not be EINVAL and
> EAGAIN is expected.

Ok, Please send a new version