Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755890AbdLOJrb (ORCPT ); Fri, 15 Dec 2017 04:47:31 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:34160 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755854AbdLOJrX (ORCPT ); Fri, 15 Dec 2017 04:47:23 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Martin Kelly , Marc Kleine-Budde Subject: [PATCH 4.4 008/105] can: usb_8dev: cancel urb on -EPIPE and -EPROTO Date: Fri, 15 Dec 2017 10:44:06 +0100 Message-Id: <20171215092306.380470917@linuxfoundation.org> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20171215092305.994559179@linuxfoundation.org> References: <20171215092305.994559179@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 998 Lines: 36 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Martin Kelly commit 12147edc434c9e4c7c2f5fee2e5519b2e5ac34ce upstream. In mcba_usb, we have observed that when you unplug the device, the driver will endlessly resubmit failing URBs, which can cause CPU stalls. This issue is fixed in mcba_usb by catching the codes seen on device disconnect (-EPIPE and -EPROTO). This driver also resubmits in the case of -EPIPE and -EPROTO, so fix it in the same way. Signed-off-by: Martin Kelly Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/usb/usb_8dev.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -524,6 +524,8 @@ static void usb_8dev_read_bulk_callback( break; case -ENOENT: + case -EPIPE: + case -EPROTO: case -ESHUTDOWN: return;