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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 E6350C282C3 for ; Thu, 24 Jan 2019 19:49:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B36D120663 for ; Thu, 24 Jan 2019 19:49:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548359352; bh=RALH6NGWe02Ci51V/cFc8rmlI791r5bMJRB8qTNn47c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=dWeN5NR93e+5pG+Pi1pdrEBpRdaG5abRrjBQNLGl8gZVWHRrQI3/fuiyOPYQ1R29O ZPHr6NUeG60Ia58N4uVXV3VRM37t0hf5y4DUj6wEHWxjlDLGCZuAwIBc4/DNIHQ0xI X2R1+drplocWdNkcxkFEOnnVQTEgHsfJnywqjmIY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732775AbfAXTl2 (ORCPT ); Thu, 24 Jan 2019 14:41:28 -0500 Received: from mail.kernel.org ([198.145.29.99]:41764 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732286AbfAXTl1 (ORCPT ); Thu, 24 Jan 2019 14:41:27 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 B804F218D0; Thu, 24 Jan 2019 19:41:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548358887; bh=RALH6NGWe02Ci51V/cFc8rmlI791r5bMJRB8qTNn47c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=B0m0EDDzdUKDkI6h+CuJguUwXjiDIhwDh6ICK7wl8uOa1+cZ6e4svnHzpvxmitPwB 4bRNg905HWrEMaeoPXfMHWF9ZuD684SEIrjO/eyERv6poyne6t2Ik8YoUXAoIsjthj NO0S4n5FjJ+UtiL2CxCmyXOQHKaT4lWnru6h846Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Suzuki Poulose , Mathieu Poirier , Mike Leach , Robert Walker , Leo Yan , Sasha Levin Subject: [PATCH 4.20 061/127] coresight: tmc: Fix bad register address for CLAIM Date: Thu, 24 Jan 2019 20:20:07 +0100 Message-Id: <20190124190214.765290802@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190124190211.984305387@linuxfoundation.org> References: <20190124190211.984305387@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore 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 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 323ed1e0f60b35df55763356d4973a18d5eaea15 ] Commit 4d3ebd3658d8 ("coreisght: tmc: Claim device before use") uses CLAIM tag to validate if the device is available, it needs to pass the device base address to access related registers. In the function tmc_etb_disable_hw() it wrongly passes the driver data pointer as register base address, thus it's easily to produce the kernel warning info like below: [ 83.579898] WARNING: CPU: 4 PID: 2970 at drivers/hwtracing/coresight/coresight.c:207 coresight_disclaim_device_unlocked+0x44/0x80 [ 83.591448] Modules linked in: [ 83.594485] CPU: 4 PID: 2970 Comm: uname Not tainted 4.19.0-rc6-00417-g721b509 #110 [ 83.602067] Hardware name: ARM Juno development board (r2) (DT) [ 83.607932] pstate: 80000085 (Nzcv daIf -PAN -UAO) [ 83.612681] pc : coresight_disclaim_device_unlocked+0x44/0x80 [ 83.618375] lr : coresight_disclaim_device_unlocked+0x44/0x80 [ 83.624064] sp : ffff00000fe3ba20 [ 83.627347] x29: ffff00000fe3ba20 x28: ffff80002d430dc0 [ 83.632618] x27: ffff800033177c00 x26: ffff80002eb44480 [ 83.637889] x25: 0000000000000001 x24: ffff800033c72600 [ 83.643160] x23: ffff0000099b11f8 x22: ffff0000099b11c8 [ 83.648430] x21: 0000000000000002 x20: ffff800033a90418 [ 83.653701] x19: ffff0000099b11c8 x18: 0000000000000000 [ 83.658971] x17: 0000000000000000 x16: 0000000000000000 [ 83.664241] x15: 0000000000000000 x14: 0000000000000000 [ 83.669511] x13: 0000000000000000 x12: 0000000000000000 [ 83.674782] x11: 0000000000000000 x10: 0000000000000000 [ 83.680052] x9 : 0000000000000000 x8 : 0000000000000001 [ 83.685322] x7 : 0000000000010000 x6 : ffff800033ebab18 [ 83.690593] x5 : ffff800033ebab18 x4 : ffff800033e6c698 [ 83.695862] x3 : 0000000000000001 x2 : 0000000000000000 [ 83.701133] x1 : 0000000000000000 x0 : 0000000000000001 [ 83.706404] Call trace: [ 83.708830] coresight_disclaim_device_unlocked+0x44/0x80 [ 83.714180] coresight_disclaim_device+0x34/0x48 [ 83.718756] tmc_disable_etf_sink+0xc4/0xf0 [ 83.722902] coresight_disable_path_from+0xc8/0x240 [ 83.727735] coresight_disable_path+0x24/0x30 [ 83.732053] etm_event_stop+0x130/0x170 [ 83.735854] etm_event_del+0x24/0x30 [ 83.739399] event_sched_out.isra.51+0xcc/0x1e8 [ 83.743887] group_sched_out.part.53+0x44/0xb0 [ 83.748291] ctx_sched_out+0x298/0x2b8 [ 83.752005] task_ctx_sched_out+0x74/0xa8 [ 83.755980] perf_event_exit_task+0x140/0x418 [ 83.760298] do_exit+0x3f4/0xcf0 [ 83.763497] do_group_exit+0x5c/0xc0 [ 83.767041] __arm64_sys_exit_group+0x24/0x28 [ 83.771359] el0_svc_common+0x110/0x178 [ 83.775160] el0_svc_handler+0x94/0xe8 [ 83.778875] el0_svc+0x8/0xc [ 83.781728] ---[ end trace 02d8d8eac46db9e5 ]--- This patch is to fix this bug by using 'drvdata->base' as the register base address for CLAIM related operation. Fixes: 4d3ebd3658d8 ("coreisght: tmc: Claim device before use") Cc: Suzuki Poulose Cc: Mathieu Poirier Cc: Mike Leach Cc: Robert Walker Signed-off-by: Leo Yan Reviewed-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/hwtracing/coresight/coresight-tmc-etf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c index 53fc83b72a49..5864ac55e275 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etf.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c @@ -86,7 +86,7 @@ static void __tmc_etb_disable_hw(struct tmc_drvdata *drvdata) static void tmc_etb_disable_hw(struct tmc_drvdata *drvdata) { - coresight_disclaim_device(drvdata); + coresight_disclaim_device(drvdata->base); __tmc_etb_disable_hw(drvdata); } -- 2.19.1