From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751861AbdHQBHn (ORCPT ); Wed, 16 Aug 2017 21:07:43 -0400 Received: from mga06.intel.com ([134.134.136.31]:36090 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751490AbdHQBHl (ORCPT ); Wed, 16 Aug 2017 21:07:41 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.41,385,1498546800"; d="scan'208";a="119858693" From: Lu Baolu To: Mathias Nyman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, zhengjun.xing@linux.intel.com, Lu Baolu Subject: [PATCH v4 0/5] usb: xhci: Handle USB transaction error on address command Date: Thu, 17 Aug 2017 09:04:22 +0800 Message-Id: <1502931867-1989-1-git-send-email-baolu.lu@linux.intel.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Xhci driver handles USB transaction errors on transfer events, but transaction errors are possible on address device command completion events as well. The xHCI specification (section 4.6.5) says: A USB Transaction Error Completion Code for an Address Device Command may be due to a Stall response from a device. Software should issue a Disable Slot Command for the Device Slot then an Enable Slot Command to recover from this error. The related discussion threads can be found through below links. http://marc.info/?l=linux-usb&m=149362010728921&w=2 http://marc.info/?l=linux-usb&m=149252752825755&w=2 This patch set includes some fixes in xhci_disable_slot() as well which will be used to handle USB transaction error on address command. --- Change log: v1->v2: - Add 4 fixes in xhci_disable_slot which will be used to handle USB transaction error on address command. v2->v3: - Add checking virt dev for test mode in PATCH 1/5. v3->v4: - Resolve xhci->mutex locking issue in 5/5. Lu Baolu (5): usb: xhci: Disable slot even virt-dev is null usb: xhci: Fix potential memory leak in xhci_disable_slot() usb: xhci: Fix memory leak when xhci_disable_slot() returns error usb: xhci: Return error when host is dead in xhci_disable_slot() usb: xhci: Handle USB transaction error on address command drivers/usb/host/xhci-hub.c | 5 ++++- drivers/usb/host/xhci.c | 54 +++++++++++++++++++-------------------------- drivers/usb/host/xhci.h | 3 +-- 3 files changed, 28 insertions(+), 34 deletions(-) -- 2.7.4