From: Simon Horman <horms@kernel.org>
To: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, netdev@vger.kernel.org
Subject: Re: [PATCH net-next] net: airoha: move get_sport() callback at the beginning of airoha_enable_gdm2_loopback()
Date: Thu, 11 Jun 2026 11:27:08 +0100 [thread overview]
Message-ID: <20260611102708.GQ3920875@horms.kernel.org> (raw)
In-Reply-To: <20260608-airoha_enable_gdm2_loopback-minor-change-v1-1-1787a0f42b31@kernel.org>
On Mon, Jun 08, 2026 at 11:24:15PM +0200, Lorenzo Bianconi wrote:
> Move the get_sport() callback invocation at the beginning of
> airoha_enable_gdm2_loopback() routine in order to avoid leaving the
> hardware in a partially configured state if get_sport() fails.
> Previously, get_sport() was called after GDM2 forwarding, loopback,
> channel, length, VIP and IFC registers had already been programmed.
> A failure at that point would return an error leaving GDM2 with
> loopback enabled but WAN port, PPE CPU port and flow control mappings
> not configured.
> Performing the get_sport() lookup before any register write guarantees
> the routine either completes the full configuration sequence or exits
> with no side effects on the hardware.
>
> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
prev parent reply other threads:[~2026-06-11 10:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-08 21:24 [PATCH net-next] net: airoha: move get_sport() callback at the beginning of airoha_enable_gdm2_loopback() Lorenzo Bianconi
2026-06-11 10:27 ` Simon Horman [this message]
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