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,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 8F746C282DD for ; Thu, 23 May 2019 19:20:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 67454205ED for ; Thu, 23 May 2019 19:20:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558639239; bh=W0f3EHcVEBs8UfuFtMj60PbcCvQ0hwXJbGh92iFhmzQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=I1qorJVmvA37nKQAjnEho3w+7709y2qEkdYi6yZEXWOx+EHLO7AGxxr3cmoUhtdND nmgKtxtgOR8BZb1FTWJK5wETJ17QE0fsH7x2O8c+1jCkWhV/LeRJgeKvW1tKQbiQXQ ONfDA8E5wrG99C9FtrmDzvhgDK2wS/TVIQwgnYm8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390089AbfEWTUi (ORCPT ); Thu, 23 May 2019 15:20:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:57414 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390072AbfEWTUe (ORCPT ); Thu, 23 May 2019 15:20:34 -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 DC231217D9; Thu, 23 May 2019 19:20:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558639234; bh=W0f3EHcVEBs8UfuFtMj60PbcCvQ0hwXJbGh92iFhmzQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NF/jovqzPltQPTZtrGXBty1yiigfoXca0GBVBwxcoEG8h7shA7hb/A/tLLtdwZcjL 2+niZE3JHZnm/vB2pqE1iDzIur/aPmdJeBrtuepveWxMnXfDIVE7jwinEU1sSN1PAh nlrWe7AFiZ7e4+BxJjbWxoEHWrFv1tQgF+QMvJOE= 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 5.0 029/139] stm class: Fix channel free in stm output free path Date: Thu, 23 May 2019 21:05:17 +0200 Message-Id: <20190523181724.485873063@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190523181720.120897565@linuxfoundation.org> References: <20190523181720.120897565@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 @@ -218,8 +218,8 @@ 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; } /*