From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9FC4AC728FF for ; Thu, 27 Feb 2020 14:23:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 770BB24688 for ; Thu, 27 Feb 2020 14:23:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582813434; bh=IAbXsdKThfWp5kflFnf+H5CpkjsYJ220+iv2NJURT2I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=FA3na6KCVaSm3nnImg3JckUAzjiyjsj0JehpyG+0iJIPwpGvCaxt+1ZujwsOSQDc/ HVTfg412gscybsjG6XTw3xCVcTlaiKctEYUwDnqUDYt4VSjwvPQD3Ugn8LpbBw5GOs Im5sGEiw8fWZxekcOZfOXkLzMhScTD9n4LZO0yNQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389015AbgB0ONu (ORCPT ); Thu, 27 Feb 2020 09:13:50 -0500 Received: from mail.kernel.org ([198.145.29.99]:52792 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389006AbgB0ONp (ORCPT ); Thu, 27 Feb 2020 09:13:45 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F0D0624691; Thu, 27 Feb 2020 14:13:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812825; bh=IAbXsdKThfWp5kflFnf+H5CpkjsYJ220+iv2NJURT2I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rpg1dWwVMWSAgdkTLUHA+J2sTv7aCi3QAI7APdHNGxt/FHQNUKr5DPCJ8dSdtSuPw QAUFPAn+usEz5YT9qm7yaYLhk9gQ/cLCCCozR8JhJva1eBQSs1iAmRIwRqupHvF95f acTompsdUSRv/JIBRmqAZa8Vcf1h8o37pbhXwPpQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Rene D Obermueller , Mathias Nyman Subject: [PATCH 5.5 031/150] xhci: Force Maximum Packet size for Full-speed bulk devices to valid range. Date: Thu, 27 Feb 2020 14:36:08 +0100 Message-Id: <20200227132237.410995572@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200227132232.815448360@linuxfoundation.org> References: <20200227132232.815448360@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mathias Nyman commit f148b9f402ef002b57bcff3964d45abc8ffb6c3f upstream. A Full-speed bulk USB audio device (DJ-Tech CTRL) with a invalid Maximum Packet Size of 4 causes a xHC "Parameter Error" at enumeration. This is because valid Maximum packet sizes for Full-speed bulk endpoints are 8, 16, 32 and 64 bytes. Hosts are not required to support other values than these. See usb 2 specs section 5.8.3 for details. The device starts working after forcing the maximum packet size to 8. This is most likely the case with other devices as well, so force the maximum packet size to a valid range. Cc: stable@vger.kernel.org Reported-by: Rene D Obermueller Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20200210134553.9144-2-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-mem.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1475,9 +1475,15 @@ int xhci_endpoint_init(struct xhci_hcd * /* Allow 3 retries for everything but isoc, set CErr = 3 */ if (!usb_endpoint_xfer_isoc(&ep->desc)) err_count = 3; - /* Some devices get this wrong */ - if (usb_endpoint_xfer_bulk(&ep->desc) && udev->speed == USB_SPEED_HIGH) - max_packet = 512; + /* HS bulk max packet should be 512, FS bulk supports 8, 16, 32 or 64 */ + if (usb_endpoint_xfer_bulk(&ep->desc)) { + if (udev->speed == USB_SPEED_HIGH) + max_packet = 512; + if (udev->speed == USB_SPEED_FULL) { + max_packet = rounddown_pow_of_two(max_packet); + max_packet = clamp_val(max_packet, 8, 64); + } + } /* xHCI 1.0 and 1.1 indicates that ctrl ep avg TRB Length should be 8 */ if (usb_endpoint_xfer_control(&ep->desc) && xhci->hci_version >= 0x100) avg_trb_len = 8;