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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 E58FEFA3728 for ; Wed, 16 Oct 2019 22:00:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B2DC7218DE for ; Wed, 16 Oct 2019 22:00:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571263215; bh=uySbU/iStrpg7gYqVAO/jw0Lt6eyVT6b5EdH9JhGSaU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=zaJGurmmDaSYoRvl8qZAn8wmTMhS1Or6lhaWDSblPahKwcP0XK8Rqx0chkHpEV/Xi uJA1gEBvYN/60s+5X42rLslJ2eTSe6p1I1TDFNKsXvdwFvgL/d6I82hXfJ2JF8kt1q aYidNuedduqss/VmrVBRwhSWfKemJim6gHCFH/3I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2438732AbfJPWAO (ORCPT ); Wed, 16 Oct 2019 18:00:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:53516 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726231AbfJPV7I (ORCPT ); Wed, 16 Oct 2019 17:59:08 -0400 Received: from localhost (unknown [192.55.54.58]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DE54221A4C; Wed, 16 Oct 2019 21:59:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1571263148; bh=uySbU/iStrpg7gYqVAO/jw0Lt6eyVT6b5EdH9JhGSaU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f5uKPT06r378iZZK/osr3cpQ8Ksn/XcJo5ESnIVCGZ+GwUEf9cgz8p35DauIkot14 pKmgeMNt/FxTRgn+Ig6APtNI1QXdMx6wk5eFAoarXHJGqlSyx6b4TyUMlgKOx2kLj0 myg+t/hnZoNZ+mhWdq0vgxer+gc35OQ8Bvmb9rw4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Johan Hovold Subject: [PATCH 5.3 030/112] USB: serial: fix runtime PM after driver unbind Date: Wed, 16 Oct 2019 14:50:22 -0700 Message-Id: <20191016214853.073187033@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191016214844.038848564@linuxfoundation.org> References: <20191016214844.038848564@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Johan Hovold commit d51bdb93ca7e71d7fb30a572c7b47ed0194bf3fe upstream. Since commit c2b71462d294 ("USB: core: Fix bug caused by duplicate interface PM usage counter") USB drivers must always balance their runtime PM gets and puts, including when the driver has already been unbound from the interface. Leaving the interface with a positive PM usage counter would prevent a later bound driver from suspending the device. Fixes: c2b71462d294 ("USB: core: Fix bug caused by duplicate interface PM usage counter") Cc: stable Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20191001084908.2003-4-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/usb-serial.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -314,10 +314,7 @@ static void serial_cleanup(struct tty_st serial = port->serial; owner = serial->type->driver.owner; - mutex_lock(&serial->disc_mutex); - if (!serial->disconnected) - usb_autopm_put_interface(serial->interface); - mutex_unlock(&serial->disc_mutex); + usb_autopm_put_interface(serial->interface); usb_serial_put(serial); module_put(owner);