From nobody Sun Feb 8 12:31:16 2026 Received: from cstnet.cn (smtp84.cstnet.cn [159.226.251.84]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 42CAD218AD4; Wed, 14 May 2025 08:29:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.84 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747211376; cv=none; b=Xyg84VhfTtv/k6Ange02OsCvmnrCYuaGtKkOmYnusGpGC4109fDkA5d/S1POS0PHVMw/LiC7NIR9goIO3VGX11zUVW/2QeSkrfNBHI13A9izH485J7GKVcvXM4Qp6Jd3Qy+4SwayTB3LgST3KR2pTlJ3ofAtfOeRY24AuMrk4A8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747211376; c=relaxed/simple; bh=h/RoXrF9EhmVB749ozpnWoC+NsjWTVPhX7E7QNI3cwk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=NS/DAgac+cgHtZ0l7ozq8PEzIlO3Rz7sqiy9NhPKBIL/77z4Zto3sRMSjVGqvQsDv+V95MXeXMyea2g4IR0eGzFy4Jo4Sbwxl4XuhmxZua97VaV3MluXxhTSZhk8BCO6fvV9ofhhqnx/XBWLNg9+3Eo5h1LnretPDY/XjQ5L/x8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.84 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost.localdomain (unknown [124.16.141.245]) by APP-05 (Coremail) with SMTP id zQCowABnpAxcVCRoIdclFQ--.54183S2; Wed, 14 May 2025 16:29:18 +0800 (CST) From: Wentao Liang To: idosch@nvidia.com, petrm@nvidia.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Wentao Liang Subject: [PATCH] mlxsw: spectrum: Reset lossiness configuration when changing MTU Date: Wed, 14 May 2025 16:28:59 +0800 Message-ID: <20250514082900.239-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.42.0.windows.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: zQCowABnpAxcVCRoIdclFQ--.54183S2 X-Coremail-Antispam: 1UD129KBjvdXoW7Xr1UJFW3Cr1DJFy8trW3trb_yoWkWFXEkr 9rZr1rW3W5ArWYkr1a9rW5Xr9Ik3ZYvFs5GFWDuFyayr9rWrW3JF97XF1xtw4kGayjqrZ8 JF4fXa43Xw17AjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb3kFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AKxVWxJr 0_GcWle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E 2Ix0cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7CjxVA2 Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x 0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2 zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF 4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWU CwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r1j6r4UYxBIda VFxhVjvjDU0xZFpf9x0JUd-B_UUUUU= X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBgwCA2gkKjK6wAAAsl Content-Type: text/plain; charset="utf-8" The function mlxsw_sp_port_change_mtu() reset the buffer sizes but does not reset the lossiness configuration of the buffers. This could lead to inconsistent lossiness settings. A proper implementation can be found in mlxsw_sp_port_headroom_ets_set(). Add lossiness reset by calling mlxsw_sp_hdroom_bufs_reset_lossiness(). Signed-off-by: Wentao Liang --- drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/e= thernet/mellanox/mlxsw/spectrum.c index 3f5e5d99251b..54aa1dca5076 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -797,6 +797,7 @@ static int mlxsw_sp_port_change_mtu(struct net_device *= dev, int mtu) =20 hdroom =3D orig_hdroom; hdroom.mtu =3D mtu; + mlxsw_sp_hdroom_bufs_reset_lossiness(&hdroom); mlxsw_sp_hdroom_bufs_reset_sizes(mlxsw_sp_port, &hdroom); =20 err =3D mlxsw_sp_hdroom_configure(mlxsw_sp_port, &hdroom); --=20 2.42.0.windows.2