linux-kernel - Re: [ewg] [PATCH] IB/ehca: Protect QP against destroying until all async events for it are handled.

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Message-ID: <adahcdaw2oc.fsf@cisco.com>
Date:	Wed, 07 May 2008 08:32:03 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Stefan Roscher <ossrosch@...ux.vnet.ibm.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"LinuxPPC-Dev" <linuxppc-dev@...abs.org>,
	"OF-EWG" <ewg@...ts.openfabrics.org>, fenkes@...ibm.com,
	raisch@...ibm.com
Subject: Re: [ewg] [PATCH] IB/ehca: Protect QP against destroying until all async events for it are handled.

 > We are not sure if this should be fixed in the driver or in uverbs itself.
 > Roland, what's your opinion about this?

Would be nice to be able to fix it in uverbs but I don't see how.  In
particular a kernel consumer has to have the same guarantee that no
async events will come in after destroy QP returns.  And I don't see any
way generic code can provide a guarantee about what low-level driver
code may do internally.
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