Date: Sat, 14 Nov 2015 08:05:31 +0100
From: Christoph Hellwig <hch@lst.de>
To: Steve Wise <swise@opengridcomputing.com>
Cc: Christoph Hellwig <hch@lst.de>, linux-rdma@vger.kernel.org,
        sagig@dev.mellanox.co.il, bart.vanassche@sandisk.com, axboe@fb.com,
        linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/9] IB: add a helper to safely drain a QP
Message-ID: <20151114070531.GC27738@lst.de>
References: <1447422410-20891-1-git-send-email-hch@lst.de> <1447422410-20891-4-git-send-email-hch@lst.de> <56460CC4.3030001@opengridcomputing.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <56460CC4.3030001@opengridcomputing.com>
User-Agent: Mutt/1.5.17 (2007-11-01)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1018
Lines: 19

On Fri, Nov 13, 2015 at 10:16:04AM -0600, Steve Wise wrote:
> So how can we do this for iwarp?  It seems like all that might be needed is 
> to modify the QP state to idle, retrying until it succeeds:
>
>    If the QP is transitioning to the Error state, or has not yet
>    finished flushing the Work Queues, a Modify QP request to transition
>    to the IDLE state MUST fail with an Immediate Error. If none of the
>    prior conditions are true, a Modify QP to the Idle state MUST take
>    the QP to the Idle state. No other state transitions out of Error
>    are supported. Any attempt to transition the QP to a state other
>    than Idle MUST result in an Immediate Error.

Can you try to write up some code for this?  We could then wire it up
in the common helper.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/