linux-kernel - RE: [PATCH net] net: mana: Add rmb after checking owner bits

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Date:   Mon, 12 Sep 2022 21:59:26 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Haiyang Zhang <haiyangz@...rosoft.com>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Paul Rosswurm <paulros@...rosoft.com>,
        Shachar Raindel <shacharr@...rosoft.com>,
        "olaf@...fle.de" <olaf@...fle.de>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: RE: [PATCH net] net: mana: Add rmb after checking owner bits

> From: LKML haiyangz <lkmlhyz@...rosoft.com> On Behalf Of Haiyang Zhang
> Sent: Sunday, September 11, 2022 1:40 PM
> ...
> Per GDMA spec, rmb is necessary after checking owner_bits, before
> reading EQ or CQ entries.
> 
> Add rmb in these two places to comply with the specs.
> 
> Cc: stable@...r.kernel.org
> Fixes: ca9c54d2d6a5 ("net: mana: Add a driver for Microsoft Azure Network
> Adapter (MANA)")
> Reported-by: Sinan Kaya <Sinan.Kaya@...rosoft.com>
> Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>

Reviewed-by: Dexuan Cui <decui@...rosoft.com>