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From:   Michael Kelley <mikelley@microsoft.com>
To:     Andrea Parri <parri.andrea@gmail.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>
CC:     KY Srinivasan <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Sasha Levin <sashal@kernel.org>,
        vkuznets <vkuznets@redhat.com>, Dexuan Cui <decui@microsoft.com>,
        Wei Liu <wei.liu@kernel.org>
Subject: RE: [PATCH v3 1/3] Drivers: hv: vmbus: Introduce table of VMBus
 protocol versions
Thread-Topic: [PATCH v3 1/3] Drivers: hv: vmbus: Introduce table of VMBus
 protocol versions
Thread-Index: AQHVg05M4bwqbVr44ky2rtn0enidW6dbrGQg
Date:   Tue, 15 Oct 2019 13:08:51 +0000
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References: <20191015114646.15354-1-parri.andrea@gmail.com>
 <20191015114646.15354-2-parri.andrea@gmail.com>
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From: Andrea Parri <parri.andrea@gmail.com> Sent: Tuesday, October 15, 2019=
 4:47 AM
>=20
> The technique used to get the next VMBus version seems increasisly
> clumsy as the number of VMBus versions increases.  Performance is
> not a concern since this is only done once during system boot; it's
> just that we'll end up with more lines of code than is really needed.
>=20
> As an alternative, introduce a table with the version numbers listed
> in order (from the most recent to the oldest).  vmbus_connect() loops
> through the versions listed in the table until it gets an accepted
> connection or gets to the end of the table (invalid version).
>=20
> Suggested-by: Michael Kelley <mikelley@microsoft.com>
> Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
> ---
>  drivers/hv/connection.c | 50 +++++++++++++++--------------------------
>  drivers/hv/vmbus_drv.c  |  3 +--
>  include/linux/hyperv.h  |  4 ----
>  3 files changed, 19 insertions(+), 38 deletions(-)
>=20

Reviewed-by: Michael Kelley <mikelley@microsoft.com>