From patchwork Wed Aug 12 13:20:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Oliver Neukum X-Patchwork-Id: 11710815 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 75AE21744 for ; Wed, 12 Aug 2020 13:20:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6744C206DA for ; Wed, 12 Aug 2020 13:20:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728016AbgHLNUx (ORCPT ); Wed, 12 Aug 2020 09:20:53 -0400 Received: from mx2.suse.de ([195.135.220.15]:55736 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727854AbgHLNUs (ORCPT ); Wed, 12 Aug 2020 09:20:48 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 6D2A1B76D; Wed, 12 Aug 2020 13:21:09 +0000 (UTC) From: Oliver Neukum To: penguin-kernel@i-love.sakura.ne.jp, bjorn@mork.no, linux-usb@vger.kernel.org Cc: Oliver Neukum Subject: [RFC 3/5] CDC-WDM: making flush() interruptible Date: Wed, 12 Aug 2020 15:20:32 +0200 Message-Id: <20200812132034.14363-4-oneukum@suse.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20200812132034.14363-1-oneukum@suse.com> References: <20200812132034.14363-1-oneukum@suse.com> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org There is no need for flush() to be uninterruptible. close(2) is allowed to return -EAGAIN. Change it. Reported-by: Tetsuo Handa Signed-off-by: Oliver Neukum --- drivers/usb/class/cdc-wdm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c index 329f8d5f7c8d..f442f34f38da 100644 --- a/drivers/usb/class/cdc-wdm.c +++ b/drivers/usb/class/cdc-wdm.c @@ -592,7 +592,7 @@ static int wdm_flush(struct file *file, fl_owner_t id) struct wdm_device *desc = file->private_data; int rv; - rv = wait_event_timeout(desc->wait, + rv = wait_event_interruptible_timeout(desc->wait, /* * needs both flags. We cannot do with one * because resetting it would cause a race @@ -608,6 +608,8 @@ static int wdm_flush(struct file *file, fl_owner_t id) return -ENODEV; if (!rv) return -EIO; + if (rv < 0) + return -EINTR; rv = desc->werr; if (rv < 0) dev_err(&desc->intf->dev, "Error in flush path: %d\n",