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=-19.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 52DA9C43461 for ; Sun, 2 May 2021 14:06:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 38311613B0 for ; Sun, 2 May 2021 14:06:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232911AbhEBOHK (ORCPT ); Sun, 2 May 2021 10:07:10 -0400 Received: from mail.kernel.org ([198.145.29.99]:51596 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233430AbhEBOGZ (ORCPT ); Sun, 2 May 2021 10:06:25 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 68DEA61476; Sun, 2 May 2021 14:05:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1619964327; bh=rBY/7Bk1Sr8TdKUOYXS2eSOAZqHHk1x1bDMTDS6FW18=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pjvgmQvQq2YliPXChebgbuPJ3aGs8/HsFfJCLfAgsJnh/Xo0IlfSEZbaHMl2tPMA/ tbPSuuLD3KpPAhWjxTXZFCtv9uI0m/YjK5sQuKOgQAXy2pvl5UXgeYupnD35p3WnQn Z+Px1ZUxasAVF09tLdwvIJGV4D7FA9gI8ZdBsIZmTCrnaP4blILRBGuuN9djqyS6Xd VKJgj8cOQVvyrWnnL+hKxvAz8hMX0ObFuhmIqEjMRoWuFxOgn3maIi/wvtJlLdWDXg ren0rDIDisLvDSzxeEDdmB0erYasPVJhYyLELuWnEkCtF+/RvWIwa2qQOE3NHTT4pM wFNUIYCzcthng== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Thinh Nguyen , Mathias Nyman , Greg Kroah-Hartman , Sasha Levin , linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 07/21] usb: xhci: Fix port minor revision Date: Sun, 2 May 2021 10:05:03 -0400 Message-Id: <20210502140517.2719912-7-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210502140517.2719912-1-sashal@kernel.org> References: <20210502140517.2719912-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Thinh Nguyen [ Upstream commit 64364bc912c01b33bba6c22e3ccb849bfca96398 ] Some hosts incorrectly use sub-minor version for minor version (i.e. 0x02 instead of 0x20 for bcdUSB 0x320 and 0x01 for bcdUSB 0x310). Currently the xHCI driver works around this by just checking for minor revision > 0x01 for USB 3.1 everywhere. With the addition of USB 3.2, checking this gets a bit cumbersome. Since there is no USB release with bcdUSB 0x301 to 0x309, we can assume that sub-minor version 01 to 09 is incorrect. Let's try to fix this and use the minor revision that matches with the USB/xHCI spec to help with the version checking within the driver. Acked-by: Mathias Nyman Signed-off-by: Thinh Nguyen Link: https://lore.kernel.org/r/ed330e95a19dc367819c5b4d78bf7a541c35aa0a.1615432770.git.Thinh.Nguyen@synopsys.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/host/xhci-mem.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 9e87c282a743..2461be2a8748 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -2134,6 +2134,15 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, if (major_revision == 0x03) { rhub = &xhci->usb3_rhub; + /* + * Some hosts incorrectly use sub-minor version for minor + * version (i.e. 0x02 instead of 0x20 for bcdUSB 0x320 and 0x01 + * for bcdUSB 0x310). Since there is no USB release with sub + * minor version 0x301 to 0x309, we can assume that they are + * incorrect and fix it here. + */ + if (minor_revision > 0x00 && minor_revision < 0x10) + minor_revision <<= 4; } else if (major_revision <= 0x02) { rhub = &xhci->usb2_rhub; } else { -- 2.30.2