linux-kernel - Re: [PATCH v3 1/2] cxl: Add mechanism for delivering AFU driver specific events

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Date:	Thu, 10 Mar 2016 12:26:22 +1100
From:	Ian Munsie <imunsie@....ibm.com>
To:	Frederic Barrat <fbarrat@...ux.vnet.ibm.com>
Cc:	Michael Ellerman <michaele@....ibm.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Matt Ochs <mrochs@...ibm.com>,
	Manoj Kumar <kumarmn@...ibm.com>,
	linuxppc-dev <linuxppc-dev@...abs.org>,
	Michael Neuling <mikey@...ling.org>
Subject: Re: [PATCH v3 1/2] cxl: Add mechanism for delivering AFU driver specific events

Excerpts from Frederic Barrat's message of 2016-03-09 20:27:20 +1100:
> It would also avoid entering
>         WARN(1, "afu_read must be buggy\n");
> if the driver changes its mind between the 2 calls :-)

Honestly, it had better not - that would be a gross violation of the
poll & read semantics and the kind of thing that leads to application
hangs.

Cheers,
-Ian