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Tue, 24 Mar 2026 05:14:31 -0700 (PDT) Received: from [192.168.88.32] ([212.105.153.60]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4871107eda1sm28749405e9.0.2026.03.24.05.14.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 24 Mar 2026 05:14:31 -0700 (PDT) Message-ID: <5e5706bb-0f04-4bb1-94f4-45083a3c76fd@redhat.com> Date: Tue, 24 Mar 2026 13:14:29 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] net: stmmac: skip VLAN restore when VLAN hash ops are missing To: Michal Piekos , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Maxime Coquelin , Alexandre Torgue , Ovidiu Panait , "Russell King (Oracle)" Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20260321-vlan-restore-error-v2-1-45cf56a5223d@mmpsystems.pl> Content-Language: en-US From: Paolo Abeni In-Reply-To: <20260321-vlan-restore-error-v2-1-45cf56a5223d@mmpsystems.pl> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/21/26 6:38 AM, Michal Piekos wrote: > stmmac_vlan_restore() unconditionally calls stmmac_vlan_update() when > NETIF_F_VLAN_FEATURES is set. On platforms where priv->hw->vlan (or > ->update_vlan_hash) is not provided, stmmac_update_vlan_hash() returns > -EINVAL via stmmac_do_void_callback(), resulting in a spurious > "Failed to restore VLANs" error even when no VLAN filtering is in use. > > Check presence of VLAN HW FILTER flags before stmmac_vlan_update(). > > Tested on Orange Pi Zero 3. > > Fixes: bd7ad51253a7 ("net: stmmac: Fix VLAN HW state restore") > Signed-off-by: Michal Piekos > --- > This patch fixes a noisy "Failed to restore VLANs" message on platforms > where stmmac VLAN hash ops are not implemented. > stmmac_vlan_restore() calls stmmac_vlan_update() without checking for > VLAN hash ops presence which results in -EINVAL. > --- > Changes in v2: > - Replace check for hash ops with check for HW FILTER flags > - Link to v1: https://lore.kernel.org/r/20260314-vlan-restore-error-v1-1-4fc6c3e2115f@mmpsystems.pl > --- > drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > index 6827c99bde8c..cfc0ce9cec9c 100644 > --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c > @@ -6863,7 +6863,8 @@ static int stmmac_vlan_restore(struct stmmac_priv *priv) > { > int ret; > > - if (!(priv->dev->features & NETIF_F_VLAN_FEATURES)) > + if (!(priv->dev->features & > + (NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER))) > return 0; > > if (priv->hw->num_vlan) Adding Russell. It's not obvious to me that with this change the restore_hw_vlan_rx_fltr() and vlan_update() callback are still invoked in all the relevant driver/features permutation. /P