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=ham 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 AFCF7C54FE4 for ; Thu, 27 Feb 2020 14:30:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 84E1B24688 for ; Thu, 27 Feb 2020 14:30:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582813823; bh=IAbXsdKThfWp5kflFnf+H5CpkjsYJ220+iv2NJURT2I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CLVGu+8I3zRB4O8hxjsPgtEQeyQ19xESXlA7N/QQGE3FuuL9R93USK1FmV9ALfZsp h/I4ReVcAmD0rx9nRStuO4MRdrhUfAVsPg6p1izcbm5P50c13bijW11l+cCFFuZAgi oVJTH7eHOoTvP/xVGn9NYDFQYaYkxe0pwgeSoY9E= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388314AbgB0OaW (ORCPT ); Thu, 27 Feb 2020 09:30:22 -0500 Received: from mail.kernel.org ([198.145.29.99]:41820 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387713AbgB0OFM (ORCPT ); Thu, 27 Feb 2020 09:05:12 -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 25EFD20801; Thu, 27 Feb 2020 14:05:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812311; bh=IAbXsdKThfWp5kflFnf+H5CpkjsYJ220+iv2NJURT2I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N4lr0BJE9XiJlvkta5RjsVc3KQLKxa9uCM3AR8euAavaAYt5LGONU5Q8toyRODWw1 5q+P03hHX+1yOm/FLhBpHfdtU271PO90M+BLsIIssPHCtRK/88lrk1mR0dOsafMEit 33DnhhgcI48Q8Z7VgJ2K1D1hdx98cHTEJrK6srUI= 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 4.19 19/97] xhci: Force Maximum Packet size for Full-speed bulk devices to valid range. Date: Thu, 27 Feb 2020 14:36:27 +0100 Message-Id: <20200227132217.754364763@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200227132214.553656188@linuxfoundation.org> References: <20200227132214.553656188@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;