Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753516AbdFSSg6 (ORCPT + 2 others); Mon, 19 Jun 2017 14:36:58 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:52392 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753470AbdFSSgw (ORCPT ); Mon, 19 Jun 2017 14:36:52 -0400 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, linux@roeck-us.net Cc: Johan Hovold , Greg Kroah-Hartman , Willy Tarreau Subject: [PATCH 3.10 053/268] USB: cdc-acm: fix failed open not being detected Date: Mon, 19 Jun 2017 20:29:12 +0200 Message-Id: <1497897167-14556-54-git-send-email-w@1wt.eu> X-Mailer: git-send-email 2.8.0.rc2.1.gbe9624a In-Reply-To: <1497897167-14556-1-git-send-email-w@1wt.eu> References: <1497897167-14556-1-git-send-email-w@1wt.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: From: Johan Hovold commit 8727bf689a77a79816065e23a7a58a474ad544f9 upstream. Fix errors during open not being returned to userspace. Specifically, failed control-line manipulations or control or read urb submissions would not be detected. Fixes: 7fb57a019f94 ("USB: cdc-acm: Fix potential deadlock (lockdep warning)") Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman Signed-off-by: Willy Tarreau --- drivers/usb/class/cdc-acm.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index b3ffc32..802df03 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -543,17 +543,17 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) acm->control->needs_remote_wakeup = 1; acm->ctrlurb->dev = acm->dev; - if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) { + retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); + if (retval) { dev_err(&acm->control->dev, "%s - usb_submit_urb(ctrl irq) failed\n", __func__); goto error_submit_urb; } acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS; - if (acm_set_control(acm, acm->ctrlout) < 0 && - (acm->ctrl_caps & USB_CDC_CAP_LINE)) { + retval = acm_set_control(acm, acm->ctrlout); + if (retval < 0 && (acm->ctrl_caps & USB_CDC_CAP_LINE)) goto error_set_control; - } /* * Unthrottle device in case the TTY was closed while throttled. @@ -563,7 +563,8 @@ static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) acm->throttle_req = 0; spin_unlock_irq(&acm->read_lock); - if (acm_submit_read_urbs(acm, GFP_KERNEL)) + retval = acm_submit_read_urbs(acm, GFP_KERNEL); + if (retval) goto error_submit_read_urbs; usb_autopm_put_interface(acm->control); @@ -584,7 +585,8 @@ error_submit_urb: error_get_interface: disconnected: mutex_unlock(&acm->mutex); - return retval; + + return usb_translate_errors(retval); } static void acm_port_destruct(struct tty_port *port) -- 2.8.0.rc2.1.gbe9624a