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

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Message-Id: <20180524.221946.1726211556549145445.davem@davemloft.net>
Date:   Thu, 24 May 2018 22:19:46 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     tlfalcon@...ux.vnet.ibm.com
Cc:     netdev@...r.kernel.org, nfont@...ux.vnet.ibm.com,
        jallen@...ux.vnet.ibm.com, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH net-next 0/8] ibmvnic: Failover hardening

From: Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
Date: Wed, 23 May 2018 13:37:54 -0500

> 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.

Series applied.