From patchwork Mon Sep 30 16:12:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 59071 Received: from vger.kernel.org ([209.132.180.67]) by www.linuxtv.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iEyIT-00038Z-0b; Mon, 30 Sep 2019 16:13:13 +0000 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732252AbfI3QNC (ORCPT + 1 other); Mon, 30 Sep 2019 12:13:02 -0400 Received: from mail-lj1-f196.google.com ([209.85.208.196]:37340 "EHLO mail-lj1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732197AbfI3QNA (ORCPT ); Mon, 30 Sep 2019 12:13:00 -0400 Received: by mail-lj1-f196.google.com with SMTP id l21so10126667lje.4; Mon, 30 Sep 2019 09:12:56 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=JUd78FTTvuyVB+HT3mJkVtnKhl3dv/ZLiCCH/pdhHmA=; b=FxJQL6lCkGTG0oUl43mi4YekI03/XjCm5fFn8/M3uXElezfRm2WQnfV9cn4bUXz+Rn +Gba7ZX3I4k1eLrrLWyCb3vXfThBiO0Kl6jQtZe0l1TgKXoJLt08jKskCXplI8kVaNSL UgWji3ez1r4GpKyG4sfL4Qks4wkPaVRHCeZxY43E5wlC0O1jpxNwN5pyg8H5/PFFMusb Q1+hJ9PvTCOgd4dkBhxKLn4de6VplHVafxoaqyH7A9m0UUMgbyHQ+q0+S/tIecUh48B9 mCjiimHnyiAeR/7fX6eXRcdg/TT1WjnAbz6XzZy+oXwBSVHNT6OeRPyetTXE0P+avNFA TChg== X-Gm-Message-State: APjAAAW9ld9T37Qjjs//KiLkd3U+ZuOOYDHmbAxtKTPEYqKjs/yMHCMq uY01Jc1MCiAgdI1RQqeuRvM= X-Google-Smtp-Source: APXvYqyMcyWg8CQU5WiXBG5Yfg/ymiXCJ4rndvXh9ArLihkSuRJk+9BdMWklYGgOcheOVUnTfeII/g== X-Received: by 2002:a2e:9185:: with SMTP id f5mr12836712ljg.235.1569859975984; Mon, 30 Sep 2019 09:12:55 -0700 (PDT) Received: from xi.terra (c-51f1e055.07-184-6d6c6d4.bbcust.telenor.se. [85.224.241.81]) by smtp.gmail.com with ESMTPSA id n25sm3459850ljc.107.2019.09.30.09.12.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 30 Sep 2019 09:12:53 -0700 (PDT) Received: from johan by xi.terra with local (Exim 4.92.2) (envelope-from ) id 1iEyIG-0004uU-8n; Mon, 30 Sep 2019 18:13:00 +0200 From: Johan Hovold To: Greg Kroah-Hartman , Mauro Carvalho Chehab Cc: Pete Zaitcev , Alan Stern , linux-media@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold , stable Subject: [PATCH 2/4] USB: usblp: fix runtime PM after driver unbind Date: Mon, 30 Sep 2019 18:12:03 +0200 Message-Id: <20190930161205.18803-3-johan@kernel.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190930161205.18803-1-johan@kernel.org> References: <20190930161205.18803-1-johan@kernel.org> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org 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 --- drivers/usb/class/usblp.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c index 7fea4999d352..fb8bd60c83f4 100644 --- a/drivers/usb/class/usblp.c +++ b/drivers/usb/class/usblp.c @@ -461,10 +461,12 @@ static int usblp_release(struct inode *inode, struct file *file) mutex_lock(&usblp_mutex); usblp->used = 0; - if (usblp->present) { + if (usblp->present) usblp_unlink_urbs(usblp); - usb_autopm_put_interface(usblp->intf); - } else /* finish cleanup from disconnect */ + + usb_autopm_put_interface(usblp->intf); + + if (!usblp->present) /* finish cleanup from disconnect */ usblp_cleanup(usblp); mutex_unlock(&usblp_mutex); return 0;