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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 457D7C433E1 for ; Mon, 29 Jun 2020 20:28:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A4B020656 for ; Mon, 29 Jun 2020 20:28:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593462507; bh=tQrJ7xXyHSuWsbMexpBpMnmj87YrtGVDi36GBSGUga4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JEjHlrKJPQMytgMeISl3Xr1VuDYCSLak01zuYYtZHG61+5L/e0tt7mRsLyQ2d9Fni 1VAyqmtVo4X8njv1K0ctLgIaWhq3kf+sZ6KcbtHRHUnsUA10KlT+UD19TX2nMnifL4 UHzc3DBW0/y0JxRde15PIhKZx4AjbfNUS46s/LQA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389093AbgF2U2Z (ORCPT ); Mon, 29 Jun 2020 16:28:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:37056 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732502AbgF2TZX (ORCPT ); Mon, 29 Jun 2020 15:25:23 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6A22D2544D; Mon, 29 Jun 2020 15:43:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593445401; bh=tQrJ7xXyHSuWsbMexpBpMnmj87YrtGVDi36GBSGUga4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b4zPsFu6tVPuzGkkopxxI6ETiKjHXv+tly7FPz2PLR0Z8XRDENOTBCRGtEqXJi6Mj 8ouy69YXFbXPY5rw82yADgh3kLEOMTtEoMPtE69T+E62UwomHJxxgvWrNlPx2GQz89 0xQcMcAanm7rJ9wXHZoNlb5qLZ+kHNC2SyDfGkaA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Al Cooper , Mathias Nyman , Greg Kroah-Hartman Subject: [PATCH 4.9 153/191] xhci: Fix enumeration issue when setting max packet size for FS devices. Date: Mon, 29 Jun 2020 11:39:29 -0400 Message-Id: <20200629154007.2495120-154-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200629154007.2495120-1-sashal@kernel.org> References: <20200629154007.2495120-1-sashal@kernel.org> MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.9.229-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-4.9.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 4.9.229-rc1 X-KernelTest-Deadline: 2020-07-01T15:39+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Al Cooper commit a73d9d9cfc3cfceabd91fb0b0c13e4062b6dbcd7 upstream. Unable to complete the enumeration of a USB TV Tuner device. Per XHCI spec (4.6.5), the EP state field of the input context shall be cleared for a set address command. In the special case of an FS device that has "MaxPacketSize0 = 8", the Linux XHCI driver does not do this before evaluating the context. With an XHCI controller that checks the EP state field for parameter context error this causes a problem in cases such as the device getting reset again after enumeration. When that field is cleared, the problem does not occur. This was found and fixed by Sasi Kumar. Cc: stable@vger.kernel.org Signed-off-by: Al Cooper Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20200624135949.22611-3-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index baacc442ec6a2..4ef019152613e 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1347,6 +1347,7 @@ static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, xhci->devs[slot_id]->out_ctx, ep_index); ep_ctx = xhci_get_ep_ctx(xhci, command->in_ctx, ep_index); + ep_ctx->ep_info &= cpu_to_le32(~EP_STATE_MASK);/* must clear */ ep_ctx->ep_info2 &= cpu_to_le32(~MAX_PACKET_MASK); ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet_size)); -- 2.25.1