Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BAC44C433EF for ; Thu, 18 Nov 2021 16:34:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A339F61A58 for ; Thu, 18 Nov 2021 16:34:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233505AbhKRQh2 (ORCPT ); Thu, 18 Nov 2021 11:37:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233490AbhKRQhQ (ORCPT ); Thu, 18 Nov 2021 11:37:16 -0500 Received: from mail-yb1-xb34.google.com (mail-yb1-xb34.google.com [IPv6:2607:f8b0:4864:20::b34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D931C06173E; Thu, 18 Nov 2021 08:34:15 -0800 (PST) Received: by mail-yb1-xb34.google.com with SMTP id i194so19707798yba.6; Thu, 18 Nov 2021 08:34:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:from:date:message-id:subject:to; bh=Oh9ODDDFLRmzNfepThPkjsuExxPNsB2gi+UCiZt5s4I=; b=dT15HCZO7fz+oE4UjAWFgomVfqsHerQzrgDkh7fvovPjfMAAMGUo1bEG5OhmYa1IyZ PX69G9ivrHzdOxizIONgbFl0+7+ENzXivFsHd2TBr04sgS0PSnBBUd5Ka50ruOTouLaB /rFabWScgn5sK4pGWt5DWQ47XLJlgnqSAyFqAKFWy7skLeVVHqlSulWqS52Gf6k3CFkV /c0WXISCjH9nSV+WQRx3lJ/xSA59JQZ2uJWXmjtLa8nPMkq7+s5QK+g3cK0AEYyQeycl QJqSnbnbGJm1Vk2IR9CyDZUqmLiWwt4m/uJ7Tk/+cduSj4GLU5LzU/NAdwLLALLdrWOG sARA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=Oh9ODDDFLRmzNfepThPkjsuExxPNsB2gi+UCiZt5s4I=; b=fB2AsiIXJd5KtAWE9623+pmVMfUeUTDyVqHdTiXv607cK7/d1oA5Kcfsja6Xm0uUS4 /xKWtDUM5O+sOqGsdmwkmhFzBjOcnOR0/+taqhPPXV1o77RFlzyTyrwir0VpJ9WVPJgO Ih7R2rqUw7ABGvavTEh3myvwP02DEd4NqJOkVX3cM35aBkSXJZKikmQj+EiDrrg2xRjz +RzUp5ZUyIWbLOXe3FdvH7bRM+xH8zyNlp8VT6/q+ZIGDT3Zb5CCpg3X5WNSVGJJS9zf KAr1Dq5fNDuz0J6E60sm4vI4HMANOcuHgdM+98QMRX9JAuXzO6cawkyB7nLoiLvHCJOH Sm6A== X-Gm-Message-State: AOAM533Fz/0BMbJN7e9DFjX/f+fXk9+/Vkti43tHct73z8RtFB+xfN1i ncMraA7KrKsKGqqkAM7Gk0HJ6jJ8CeDGp/fT1tVOkFA/L0I= X-Google-Smtp-Source: ABdhPJxrEJw1OHs98sWXO7Piw0y47LexL2GylnuTlY6IMnCfPeRhf87BCXCA7VCUdANyWiDLKofBJCL2mZAkxMg2+p8= X-Received: by 2002:a25:d743:: with SMTP id o64mr28709401ybg.81.1637253254713; Thu, 18 Nov 2021 08:34:14 -0800 (PST) MIME-Version: 1.0 From: Muni Sekhar Date: Thu, 18 Nov 2021 22:04:03 +0530 Message-ID: Subject: USB: invalid maxpacket 8 To: linux-usb@vger.kernel.org, kernelnewbies , linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi all, I'm trying to connect to a USB device on Linux PC and getting an error about "invalid maxpacket 8". What does it mean? Does this error causes USB packet transfer failures? Any ideas how to fix this? Thank you for any pointers. dmesg log: --------------- [1920549.030669] usb 2-2: New USB device found, idVendor=05c6, idProduct=9500 [1920549.030682] usb 2-2: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [1920549.032623] hub 2-2:1.0: USB hub found [1920549.032672] hub 2-2:1.0: 7 ports detected [1920549.302875] usb 2-2.1: new high-speed USB device number 98 using xhci_hcd [1920549.391765] usb 2-2.1: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 8 [1920549.391777] usb 2-2.1: config 1 interface 0 altsetting 0 bulk endpoint 0x2 has invalid maxpacket 8 -- Thanks, Sekhar