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,USER_AGENT_GIT autolearn=unavailable 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 574B5C43603 for ; Thu, 19 Dec 2019 19:00:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 23C2D227BF for ; Thu, 19 Dec 2019 19:00:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576782018; bh=+QFZ0PqQXFrX1Li2tQ3mjalt/hJvFDccFtVHz/pMezo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EAsOKzP0oK6RyOTLGS+ptDlghUIAB6VTpNnBUg13Mh8rof5hOYsHUIX4SdEaHdv3w azpuOnjnOb0uPD8pHkhtrXF/Xz1EW7+sWj+sn9aAGxlF2lxahxsQ9+gc4gNs4uU0Q6 0t5s6GUEnAuAQ5BbJoz+Etw0s9cAxa+NdeZD2ZhI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727956AbfLSSwY (ORCPT ); Thu, 19 Dec 2019 13:52:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:46984 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730263AbfLSSwX (ORCPT ); Thu, 19 Dec 2019 13:52:23 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 CF7E3227BF; Thu, 19 Dec 2019 18:52:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576781542; bh=+QFZ0PqQXFrX1Li2tQ3mjalt/hJvFDccFtVHz/pMezo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SAQaZNAkFCJAWucfa2tjGkDpA/GxtaaIUQA3nd0dXVINN3fRVDS+HVGJee6qhX0EQ Cn57ikkqeWfFjbmOuNvZGtLPwwuiJNIMS8BhbtPw56sflRqAliYapqBf15ZHyEUv/d rJdm6gL3awhG+w070wMymalECBlk7ABFiYhr6aLQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Srinivas Kandagatla , Chris Lew , Bjorn Andersson Subject: [PATCH 4.19 27/47] rpmsg: glink: Put an extra reference during cleanup Date: Thu, 19 Dec 2019 19:34:41 +0100 Message-Id: <20191219182932.332192007@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191219182857.659088743@linuxfoundation.org> References: <20191219182857.659088743@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Chris Lew commit b646293e272816dd0719529dcebbd659de0722f7 upstream. In a remote processor crash scenario, there is no guarantee the remote processor sent close requests before it went into a bad state. Remove the reference that is normally handled by the close command in the so channel resources can be released. Fixes: b4f8e52b89f6 ("rpmsg: Introduce Qualcomm RPM glink driver") Cc: stable@vger.kernel.org Tested-by: Srinivas Kandagatla Signed-off-by: Chris Lew Reported-by: Srinivas Kandagatla Signed-off-by: Bjorn Andersson Signed-off-by: Greg Kroah-Hartman --- drivers/rpmsg/qcom_glink_native.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -1644,6 +1644,10 @@ void qcom_glink_native_remove(struct qco idr_for_each_entry(&glink->lcids, channel, cid) kref_put(&channel->refcount, qcom_glink_channel_release); + /* Release any defunct local channels, waiting for close-req */ + idr_for_each_entry(&glink->rcids, channel, cid) + kref_put(&channel->refcount, qcom_glink_channel_release); + idr_destroy(&glink->lcids); idr_destroy(&glink->rcids); spin_unlock_irqrestore(&glink->idr_lock, flags);