From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ej2-f41.google.com (mail-ej2-f41.google.com [74.125.228.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1D83735E92F for ; Mon, 5 Oct 2026 07:52:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.228.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791186762; cv=none; b=pDE2cNE94+e7zn9DifNYjPA2vgFGeofm1Z9YaiAQictLe5YL0FJwGoKOyC0WJpcuS/8tfnI9eRgwQEo3mQg0exzcFzpog+X/PUIC1zwwDUxstgeExwtOccmu/Xng82EGAkQR3fu7QJfc1qShYKHNeaTpxvWNWEkrsLQsm1qzAB8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791186762; c=relaxed/simple; bh=82r4qovijQ1dYl4fpF5dysLdPQXbMGcexIEnsSETYVA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Znj9s120KyzGWJBH9dgrX+oAYcqgHhHtYPPG45yYiEhO9pEQ+BQ6dSplhh6AYHteAZhPxvtYndF5QinHau9AX1zldOiKVkxGp4+h8/PU9rz1fefKHiGdZh0JPesnMvahIFVNC2yStseJAFG/enprupW8s2kj4vUfgCCkDHcp95k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=CelSwl3R; arc=none smtp.client-ip=74.125.228.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CelSwl3R" Received: by mail-ej2-f41.google.com with SMTP id a640c23a62f3a-c2e0b486d91so249320166b.2 for ; Mon, 05 Oct 2026 00:52:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1791186759; x=1791791559; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=Hkbmmu29f4ESmjhS/R6fVuQiC+U9d5xHF0gJ/jLHU0E=; b=CelSwl3RTr8JSTz99vh2oPK3bQgXmhmwggJLgEX2LDuOAtB+rgsW4E1jjgCzwkp7oK 5JQaMJcpkvSPxwZzWWTqqfWqTxwqTcf0cVC6aqWG2YV59psGQonjjZwWTn3vMkiqAHsn e1Te0XEyVb3AZpJ22AovJzkgxQHnfe0jyW882MY6xEXBdnTICOfOV2qZYlN3KTJp5bGs ZjhgXtmRGgBz9TvCPWn40PSobRl/HmZNp0c67u8jkcaSiEPG4jQEfSnjjAUZY8fMUAO9 22VZZR/KW7NTFRQkK0LO2V/PgDtuSX9C9koMoGqEN/2G5MdeXu0E5VweHVliFa56jnxA eBIA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791186759; x=1791791559; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=Hkbmmu29f4ESmjhS/R6fVuQiC+U9d5xHF0gJ/jLHU0E=; b=QeKx7fMoj9S4z7s+4H0KlB4PKpsK00qv8w1bqYZsdSfmhFTImHiT1zMjeFEnd2YJWH gfWIlTTy3wTkODgIWvMao9pm3ufmem8zuKW//bPlRnrE1XL5ipYGNcvMhiSg/FjP06tK l04GBpnKdxaPCMX3KkwTGitG1IhnxciU2jHUbKX/fawW8ZbtKZvFaHVFJG8+ILzKCZB9 vuKAXOPB5LiZdOIeIq3Y5WqogBLVimjYy3yIj3fXLLOwWA8m1rXNiTIbLCW4Gcvu6uca Ump+taxBd2YDZxLHtlJbXsLihwDXE32dOUCc1w9cz3sbqDh5/KSW6+e/C8aiQYoSUK/T FUTA== X-Forwarded-Encrypted: i=1; AKwUvBwf1Ayh6ytr5UdHeQsrI6nt2zi11WqAR5wqEjqTr3BLTnm8AjXnJeO060h/6TvJVOGsR0y2pgYkKe94FsM=@vger.kernel.org X-Gm-Message-State: AFuF++nzw+TfC2sexWSY/MAyqhc6U19BWwbra5JO22Mn2PDzJ7NlYGQL ol8F6lejf2ogZD2//cUZGpuSVba+lP/RlARFR0eTcXQdfFib11ctnjbA X-Gm-Gg: AYBFou3ixoPpgYNnvVdxwMBUsOeeAe+Hb0YimVwJC/5nuW653tiPxZ8SilR0MfNp3WV ifbiiBvPlGotW67IYw0b+y8EU6oEa9WTvpG8dYIKpiaz4eucaFk7cH61NWneJSgAzYwHoKyn5Yc Xdrrj7rfP+3JzHl6kA8Icpt6iUaVep2Kg893NCzsMvn2gb391cSOxB3VaJqhEh3Kc+xzkuYzqiG DzBBLfPr9D/OPFuNIFFpyRSLdc+WSrRVVo0ckfu6Izs9fHWCJoGXGIbSrRPGrPa16xtRt6efR4e JuWtlC4Kn2fWoq2hqABFcVM+h1yBEzrz3wcZpjcHFI6JVff2S9guNYOyZtg6oLMVcSud+6kYXdy Tty4Jxk99eTZ3ysSFzmYzZKazfaMZsLU9ZXUruuUyu/iSnVUJWZ44EmGgMKK2/U0T7imsRcWy0v cWeoqP3nZWgnrvgFmtopEXjW02b0adJCl/TfR/xp7WRzxQLNnevlGpagvnXuER7G4oUN4+kUnvl Aa5iGbO71r/lBxY9jd6 X-Received: by 2002:a17:907:398f:b0:c29:f199:5fa7 with SMTP id a640c23a62f3a-c2e4af87abemr808224266b.44.1791186759326; Mon, 05 Oct 2026 00:52:39 -0700 (PDT) Received: from gentoo (m-37-0-164-22.cust.tele2.lt. [37.0.164.22]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c3157ec8c0esm21330266b.44.2026.10.05.00.52.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Oct 2026 00:52:39 -0700 (PDT) From: Rokas Juras To: netdev@vger.kernel.org Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@kernel.org, kuba@kernel.org, pabeni@redhat.com, gregkh@linuxfoundation.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net] rndis_host: enable RX aggregation for OnePlus Nord CE 2 Date: Mon, 5 Oct 2026 10:48:52 +0300 Message-ID: <20261005074852.76818-1-asrokasjuras@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit USB tethering on the OnePlus Nord CE 2 (IV2201, USB ID 22d9:2766) running Android 13 has download speeds of approximately 2mbps with the default 2048-byte receive limit. The phone's published RNDIS code only enables packet batching when the computer reports a receive limit above 2048 bytes. Testing shows that increasing this limit to 2560 bytes restores normal speeds. Add a quirk for USB device 22d9:2766 to use and advertise a receive buffer of at least 16 KiB. This fits the phone code's default batch of ten packets at a 1500-byte MTU. Tested on 7.3.0-rc5 with the affected phone, including reconnecting USB tethering. Download speeds with the change exceed 100mpbs. Fixes: 7e99eeddb35c ("rndis_host: support WM6 devices as modems") Link: https://github.com/OnePlusOSS/android_kernel_oneplus_mt6877/blob/3c1e3d432d0c35afa7fded974b50fa6617219e0f/drivers/usb/gadget/function/f_rndis.c#L538-L551 Link: https://github.com/OnePlusOSS/android_kernel_oneplus_mt6877/blob/3c1e3d432d0c35afa7fded974b50fa6617219e0f/drivers/usb/gadget/function/u_ether.c#L869-L874 Assisted-by: LLM Signed-off-by: Rokas Juras --- drivers/net/usb/rndis_host.c | 21 +++++++++++++++++++++ include/linux/usb/rndis_host.h | 5 +++-- 2 files changed, 24 insertions(+), 2 deletions(-) diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c index 37d4865f5..b001bc834 100644 --- a/drivers/net/usb/rndis_host.c +++ b/drivers/net/usb/rndis_host.c @@ -345,6 +345,11 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags) dev->rx_urb_size = dev->hard_mtu + (dev->maxpacket + 1); dev->rx_urb_size &= ~(dev->maxpacket - 1); + + /* some devices require a receive limit above 2048 for RX aggregation */ + if (dev->driver_info->data & RNDIS_DRIVER_DATA_RX_AGGREGATION) + dev->rx_urb_size = max_t(size_t, dev->rx_urb_size, 16 * 1024); + u.init->max_transfer_size = cpu_to_le32(dev->rx_urb_size); net->netdev_ops = &rndis_netdev_ops; @@ -612,6 +617,17 @@ static const struct driver_info rndis_info = { .tx_fixup = rndis_tx_fixup, }; +static const struct driver_info rndis_rx_aggregation_info = { + .description = "RNDIS device", + .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, + .data = RNDIS_DRIVER_DATA_RX_AGGREGATION, + .bind = rndis_bind, + .unbind = rndis_unbind, + .status = rndis_status, + .rx_fixup = rndis_rx_fixup, + .tx_fixup = rndis_tx_fixup, +}; + static const struct driver_info rndis_poll_status_info = { .description = "RNDIS device (poll status before control)", .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, @@ -649,6 +665,11 @@ static const struct driver_info rndis_info_lowpower = { static const struct usb_device_id products [] = { { + /* OnePlus Nord CE 2 */ + USB_DEVICE_AND_INTERFACE_INFO(0x22d9, 0x2766, + USB_CLASS_WIRELESS_CONTROLLER, 1, 3), + .driver_info = (unsigned long)&rndis_rx_aggregation_info, +}, { /* 2Wire HomePortal 1000SW */ USB_DEVICE_AND_INTERFACE_INFO(0x1630, 0x0042, USB_CLASS_COMM, 2 /* ACM */, 0x0ff), diff --git a/include/linux/usb/rndis_host.h b/include/linux/usb/rndis_host.h index 489cfb1d0..3eaf57a9b 100644 --- a/include/linux/usb/rndis_host.h +++ b/include/linux/usb/rndis_host.h @@ -182,8 +182,9 @@ struct rndis_keepalive_c { /* IN (optionally OUT) */ #define FLAG_RNDIS_PHYM_WIRELESS 0x0002 /* Flags for driver_info::data */ -#define RNDIS_DRIVER_DATA_POLL_STATUS 1 /* poll status before control */ -#define RNDIS_DRIVER_DATA_DST_MAC_FIXUP 2 /* device ignores configured MAC address */ +#define RNDIS_DRIVER_DATA_POLL_STATUS 1 /* poll status before control */ +#define RNDIS_DRIVER_DATA_DST_MAC_FIXUP 2 /* device ignores configured MAC address */ +#define RNDIS_DRIVER_DATA_RX_AGGREGATION 4 /* needs RX limit > 2048 */ extern void rndis_status(struct usbnet *dev, struct urb *urb); extern int -- 2.55.0