linux-kernel - Re: [PATCH net] net: mscc: fix the injection header

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Message-Id: <20180621.103028.1089744235700408030.davem@davemloft.net>
Date:   Thu, 21 Jun 2018 10:30:28 +0900 (KST)
From:   David Miller <davem@...emloft.net>
To:     antoine.tenart@...tlin.com
Cc:     f.fainelli@...il.com, andrew@...n.ch, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, thomas.petazzoni@...tlin.com,
        alexandre.belloni@...tlin.com, quentin.schulz@...tlin.com,
        allan.nielsen@...rosemi.com
Subject: Re: [PATCH net] net: mscc: fix the injection header

From: Antoine Tenart <antoine.tenart@...tlin.com>
Date: Wed, 20 Jun 2018 10:50:46 +0200

> When injecting frames in the Ocelot switch driver an injection header
> (IFH) should be used to configure various parameters related to a given
> frame, such as the port onto which the frame should be departed or its
> vlan id. Other parameters in the switch configuration can led to an
> injected frame being sent without an IFH but this led to various issues
> as the per-frame parameters are then not used. This is especially true
> when using multiple ports for injection.
> 
> The IFH was injected with the wrong endianness which led to the switch
> not taking it into account as the IFH_INJ_BYPASS bit was then unset.
> (The bit tells the switch to use the IFH over its internal
> configuration). This patch fixes it.
> 
> In addition to the endianness fix, the IFH is also fixed. As it was
> (unwillingly) unused, some of its fields were not configured the right
> way.
> 
> Fixes: a556c76adc05 ("net: mscc: Add initial Ocelot switch support")
> Signed-off-by: Antoine Tenart <antoine.tenart@...tlin.com>

Applied, thank you.