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[31.21.172.249]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c46bd66bd3asm668971966b.56.2026.10.28.17.58.09 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Wed, 28 Oct 2026 17:58:10 -0700 (PDT) From: Emir Beganovic To: Birger Koblitz Cc: Andrew Lunn , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Russell King , Andrew Lunn , Heiner Kallweit , Huacai Chen , WANG Xuerui , Eric Dumazet , Jianhui Xu , Nicolai Buchwitz , linux-usb@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev Subject: Re: [PATCH net-next v19 00/13] ax88179_178a: Add support for AX88179A-based chips Date: Thu, 29 Oct 2026 01:58:09 +0100 Message-ID: <20261029005809.19405-1-beganovic.emir@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20261010-ax88179a-v19-0-7475173cfb56@birger-koblitz.de> References: <20261010-ax88179a-v19-0-7475173cfb56@birger-koblitz.de> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi Birger, I tested v19 on a Dell DA305 USB-C adapter. It has an AX88179A (0b95:1790, bcdDevice 0x0200, FW 1.0.7.131) behind a VIA VL822 hub, plugged into a Dell XPS 16 (Panther Lake). The peer is an Intel I225-V behind a switch. I built ax88179, libphy, phylink and ax88796b as modules for a 7.2.8 kernel. v19 needed two things on that base: a4e22e9253e7 and a backport of genphy_{read,write}_mmd_c45() from the adin1140 series. With the current driver in configuration 1 this adapter never gets a link ("Failed to read reg index 0x0040: -32"). With v19: - 1000/full link with flow control - download 940-941 Mbit/s in nine runs. Upload was 937-941 in five of nine and lower in the other four, and I couldn't find why. Eight later runs with tracing on all averaged about 932. - 1-byte TCP request/response around 190-200 us, against about 1.46 ms with cdc_ncm on the same port (its default 400 us TX timer) - switching itself to configuration 1 when the device comes up in the CDC configuration - 100M and 10M links - VLAN with rx-vlan-offload on and off, and rx-vlan-filter dropping a VID that isn't configured - multicast filtering and allmulti - suspend/resume (s2idle) and wake-on-LAN with a magic packet Two small things I noticed: - "Switching to vendor mode" is printed twice, once per CDC interface, and before the netdev is registered, so it shows up as "(unnamed net_device) (uninitialized)". - After a WoL wake the link goes down and up twice within about 2.5 s, where a normal resume shows a single link up. It comes back fine either way. I only have this one adapter, so nothing on the other chips. Tested-by: Emir Beganovic Thanks, Emir