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=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,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 3F533C28EBD for ; Sun, 9 Jun 2019 16:57:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0C00F205ED for ; Sun, 9 Jun 2019 16:57:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560099437; bh=VphfbzlgHyn6OK3FErbHf/D75U3ORSr31UcD+mkCyLc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WBEhK5xwNpiQN277kMy98AACbhl+wS2rdWxdOqOqgxVccp/sGpDCFhbIu8eLZ7AiT fXvzlqKYdaEkrNiyXO77jk2k8PgEFecRC2mNX1x+BUM5AbgNjuANjUSxTF7xXeeLN+ JLRL0m8z7uKHqMrsUytBrgIuXMH2rAkBDZRZKFqg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733148AbfFIQ5Q (ORCPT ); Sun, 9 Jun 2019 12:57:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:60112 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732147AbfFIQ5O (ORCPT ); Sun, 9 Jun 2019 12:57:14 -0400 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 4F789204EC; Sun, 9 Jun 2019 16:57:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1560099433; bh=VphfbzlgHyn6OK3FErbHf/D75U3ORSr31UcD+mkCyLc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H0eqJZZ0F8S6OIS3PAAA8vjh/CHz9vjeNxFdz84ho0UJ21BHc3qQECjPp/LsFFDDU A/yqAo9i51vVq9PQIGGDeeO1yOEByHuVW0E/JTkan8GaFCXVHYWTmi9/MP3t2QeIZX MbunJgD+XICV0yWLmI/sYNT0TQCM4iyAqKCws1RA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tingwei Zhang , Sai Prakash Ranjan , Alexander Shishkin Subject: [PATCH 4.4 037/241] stm class: Fix channel free in stm output free path Date: Sun, 9 Jun 2019 18:39:39 +0200 Message-Id: <20190609164148.844921030@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190609164147.729157653@linuxfoundation.org> References: <20190609164147.729157653@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: Tingwei Zhang commit ee496da4c3915de3232b5f5cd20e21ae3e46fe8d upstream. Number of free masters is not set correctly in stm free path. Fix this by properly adding the number of output channels before setting them to 0 in stm_output_disclaim(). Currently it is equivalent to doing nothing since master->nr_free is incremented by 0. Fixes: 7bd1d4093c2f ("stm class: Introduce an abstraction for System Trace Module devices") Signed-off-by: Tingwei Zhang Signed-off-by: Sai Prakash Ranjan Cc: stable@vger.kernel.org # v4.4 Signed-off-by: Alexander Shishkin Signed-off-by: Greg Kroah-Hartman --- drivers/hwtracing/stm/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/hwtracing/stm/core.c +++ b/drivers/hwtracing/stm/core.c @@ -210,8 +210,8 @@ stm_output_disclaim(struct stm_device *s bitmap_release_region(&master->chan_map[0], output->channel, ilog2(output->nr_chans)); - output->nr_chans = 0; master->nr_free += output->nr_chans; + output->nr_chans = 0; } /*